Best HEI Distributor For 350 Chevy

In this essay, I will discuss an element of the automobile that we take for granted but does a lot of work behind the scenes. It is also known as a high-energy ignition distributor or electronic ignition system.

Because of its versatility, great performance, and low cost, this type of distribution system is used for spot ignition. If your vehicle has a Chevy 350 engine, we can help you locate the best product.

In this section, I analyzed the various aftermarkets and discussed factors to consider when shopping. As a result, don’t miss any steps and choose the best HEI distributor for 350 Chevy. This can help you avoid problems such as fires, power outages, and higher fuel usage.

What Is an HEI Distributor?

The ignition distributor is an essential component of any internal combustion engine that employs spark ignition, and the best distributor for the Chevrolet 350 will give you good engine performance.

The distributor’s job is to carry the high voltage from the coil to the spark plug and finally to the cylinder in the proper ignition sequence. To prevent the spark plug from burning out, the timing and delivery of this voltage must be precise. Consequently, if you want to enjoy your Chevy 350, be sure to use the right dispenser, as it is critical to the performance of the Chevy 350.

Don’t worry, you don’t have to choose between them. Distributors are the best choice for you. Our list of the best Chevrolet 350 distributors is an excellent place to start. Before we go any further, here are several symptoms that the distributor is not functioning properly.

  • Engine misfiring.
  • The engine is hard to start.
  • The engine is unusually noisy or shrill.

Best HEI Distributor For 350 Chevy

I chose components that perfectly meet the OEM requirements for the Chevy 350 engine. You can order any of them with perfect confidence, with the exception of compatibility issues.

1. MSD 85551 Pro-Billet Distributor

Those who drive racing or luxury vehicles and often exceed the speed limit in their region will find the MSD 85551 Pro-Billet MSD Distributor to be very popular. It is a mechanically sophisticated product that will intervene when the engine load is too great and the RPM is forced to the maximum.

When the pedal is fully depressed, the rotor built into the machine is accelerated. As a result, the rotor starts to move forward. The program as a whole will benefit you in the long run by providing additional possibilities for the car. This implies that when the red signal light changes to green, your car will be the fastest place to leave.

This model, in addition to assisting you in realizing all your high-speed fantasies, features maintenance-free electromagnetic pickups. It has a precise magnetoresistance to ensure that the signal it provides is consistent throughout the RPM range. The HEI distributor’s polished steel is QPQ coated and has high wear resistance.

The fact that its weight and precompressed plate have a double coating of chrome-plated steel and QPQ is the most crucial feature. Both materials are the gold standard for rust protection, according to your technician. As a result, they can extend the service life of the distributor.

2. MAS Ignition Distributor w/Cap & Rotor

Because MAS distributor parts are strong and durable, they are well known among vehicle technicians. This HEI distributor is no exception. It features a distinctive look and will fully support your 350 Chevy. As a result, the engine will run smoother and faster using this distributor.

You may also like the fact that this model includes long-life terminals. They provide optimal conductivity for the materials used in the construction, as well as a simple assembly approach. As a result, you can rely on them to improve the performance of your engine.

Another outstanding attribute of this technology is its low cost. It offers the ideal combination of a great design, an adjustable feed rate, and a durable enclosure at an affordable price. This is what makes this unit doubly worthy of your attention.

The cover and rotor, along with the HEI distributor, are 100% interchangeable with OEM components.

3. MSD 8362 Street Fire HEI Distributor

One thing that constantly strikes us about MSD’s HEI distributors. They all come with a substantial one-year warranty, regardless of whether they are expensive or the aforementioned cheap ones. It may not sound like much, but it’s more than what other publishers offer.

MSD’s structure is one of the reasons it is so confident in the quality of its products. As an example, consider this HEI distributor. It has a heavy-duty distributor gear that can withstand engine vibration, internal and external heat, and corrosion.

The counterweight pin has the same level of toughness. They are firmly welded and coated with corrosion-resistant and anti-rust compounds. At the same time, the entire distributor has an adjustable vacuum, allowing it to adapt to the engine’s requirements.

4. Dragon Fire High-Performance HEI Distributor

Knowing the importance of brand recognition, your hose may be upset to learn that the equipment is not from a well-known firm. Others who don’t may benefit from its simple installation, rugged construction, and high-end features at a fair price. That’s it.

Start by installing the software. This device has a cable connector so you spend less time under the hood. You don’t need to spend a lot of time researching the engine if you’ve worked with similar equipment before. The whole procedure will be flawless.

The structure comes next. It has a bronze-coated vacuum tank liner and brass connections that are (almost) rust-proof. This allows them to survive the test of time and continue to provide longer and more consistent sparks.

Then there are their well-known qualities. The unit is equipped with a TachDrive mechanical connection that works with its standard tachometer.

5. ACDelco 93440806 GM Original Equipment Ignition Distributor

What is the second-best feature of the Chevrolet 350? We are all aware that using factory components is the best option. At the same time, the second-best alternative is to use non-genuine but manufacturer-recommended components. This is precisely what ACDelco 93440806 offers.

The HEI distributor will make every effort to obtain the “GM Recommended” certification. It guarantees the reliability, durability and quality of the company’s original equipment. Product specifications, assembly, form and function are equally identical to those of General Motors.

Finally, HEI distributors offer everything you would expect in terms of assembly. The switching device is the most crucial of these, as it provides a signal to the ignition coil, allowing it to turn on and off at precisely the right time. This can help with problems such as engine breakdowns.

6. Performance HEI Ignition Distributor for Chevy GM 350

Most HEI distributors in the market offer either compatibility. Either they require you to apply them in normal situations or they don’t. Or, they are designed for racing. It’s hard to find a model that can do both. The facts show that the HEI high-performance ignition distributor serves two purposes.

Start with its use in racing applications. The model’s CNC-machined aluminum body is equipped with 75,000 high-voltage coil sparks that can’t start a fire until RPMs exceed 9,000. This is the kind of power and racing class that racers fantasize about.

Riders on foot can benefit from the same technology. The unit’s high-performance coil generates 65,000-volt sparks at 7500 RPM. This range is more than enough for drivers in their neighborhood or on routes where the speed limit is always lower than they want.

7. MOSTPLUS Racing HEI Distributor

Almost every model you’ve seen so far is compatible with a wide range of Chevy engines. This HEI Racing distributor is unique. It restricts usability to just three options. They contain small components from the Chevrolet 350, 305, and 400. As a result, you can depend on their installation instructions for more details.

The model will be delivered to your home and will come with everything you need to set it up and get it running. Along with the ignition module, there are covers, coils, and rotors. Essentially, you can believe that everything you need is present. There is no need to buy anything off the shelf.

One item that disappointed us was the absence of an installation guide. The package contains no installation or assembly instructions. Either you must do it all yourself, or if you want to avoid the hassle of fruitless efforts, you are advised to employ a mechanic.

What to Consider Before Buying the Best HEI Distributor For 350 Chevy 

One of the main purposes of the HEI distributor is to optimize the ignition timing of the vehicle. This is done to ensure that the mixture is ignited at the proper time to maximize engine efficiency and performance. As a result, timing is essential to your vehicle’s mileage.

HEI distributors fall into two categories based on how ignition timing is advanced: mechanical advance and vacuum advance. Both advance ignition timing, but their methodology, speed of action, and other factors vary. That’s about it.

Principle of operation

The spring and weight in the distributor are used by the HEI mechanical distributor to adjust the position of the timing sensor shaft. The vacuum unit operates in a somewhat different manner.

They rely on the manifold vacuum to respond to the rotation of the position sensor mounting plate on the distributor. Therefore, under higher engine loads, these units allow the distributor to return to its set point sooner.


When the engine revs up to high rpm, the HEI mechanical distributor kicks in. At this point, the distributor rotates rapidly to engage the propulsion mechanism.

By controlling vehicle speed changes at engine load, the HEI vacuum distributor can give a good timing advance at low engine RPM.


Because they only operate when the engine is under significant load, mechanical HEI distributors offer additional advantages in high-speed situations (such as high-speed automobile driving).

At low speeds, vacuum units can give higher engine performance and improve fuel efficiency, as their timing is increased. They also improve the “pick-up” of your vehicle.


You may have already gathered that mechanical HEI distributors are not intended for everyday use. They are a better choice if you are a racer or luxury driver.

The function of the vacuum device is not in daily driving, but in this scenario, as these distributors allow for good fuel economy and superior engine performance at low speeds.

How to Install HEI Distributor on Chevy 350?

There is no need to worry about the placement or orientation of HEI Distributors as long as the ignition timing is accurate. Let’s look at how to properly install the HEI 350 Chevy Distributor using the methods below.

  1. First, note that the power wire and tachometer wire are placed on the driver’s side. Go ahead and there will be a gap on the passenger side.
  2. Find the sequence of spark plugs and connect them to the correct cylinders. Start with the power wire and work clockwise; the second wire is for cylinder 1.


Are HEI distributors better than points?

The difference is that electrons do not degrade instantly. If you want reliability and simplicity of maintenance, invest in an HEI distributor. There is no need to specify the residence time or mark the gap on the HEI distributor.

What does HEI stand for on a distributor?

High-energy ignition, also known as H.E.I., is an electronic ignition system designed by General Motors’ Delco-Remy department.

Is an HEI distributor better?

Yes, HEI distributors with stand-alone designs are best suited for off-road cars and other vehicles. Their enormous appeal is due in part to their ease of installation and minimal wiring.

What happens if the ignition timing is too advanced?

Pre-ignition timing, in short, can lead to engine overheating. During the combustion process, an enormous amount of heat is created by prematurely igniting the peaks of the fuel-air mixture.

Final Thought

Assuming you have identified the best HEI distributor for 350 Chevy on the market, you are surely aware of how difficult it is to discover the right product among the various possibilities on the market right now. The terrible news doesn’t stop there.

Most of the technology offered out there promises the moon but is powerless to deliver. They either have problems with their structure or have poor qualities. You can buy any of the best HEI distributors mentioned above, even if they charge the same price.

The equipment of this model is not only trusted by our specialists but is the first choice for thousands of technicians and drivers like you. Plus, they offer longer warranty life and premium features to further support your selection. As a result, if you choose them in the end, you won’t incur any losses other than poor engine performance.


Hi, I'm the initiator and writer of this blog. Cars were and will be my first love, and my favorite hobby, that's why I decided to start this blog and write about my discoveries and techniques to improve my cars or repair them.