Are Chevy distributors interchangeable?

Are Chevy Distributors Interchangeable?
When it comes to Chevy distributors, interchangeability depends on the specific engine type and deck length. Here’s a breakdown based on the information from various sources:
1. Small-Block and Big-Block V-8s:
– Interchangeable: Small-Block and Big-Block V-8 distributors are generally interchangeable, except for tall-deck engines, for which an adjustable slip collar distributor is recommended.
2. Standard-Deck and Tall-Deck Engines:
– Not Interchangeable: Distributors for standard-deck (short) engines and tall-deck engines are not interchangeable. Most production and high-performance Chevy engines were based on short-deck blocks, except for the 572 crate engine, so most distributors are short-deck units.
3. Inline Six Engines:
– Possibly Interchangeable: There are conflicting opinions regarding the interchangeability of distributors for inline six engines. While some sources suggest that the same distributor may fit different inline six engines regardless of year, others indicate differences in part numbers and measurements, requiring careful comparisons before interchangeability can be confirmed.
4. GMC and Chevy 6-Cylinder Engines:
– Possibly Not Interchangeable: There are indications that distributors for GMC 270/302 and Chevy 235/261 engines may not be interchangeable, as suggested by a company that manufactures mini HEI distributors for the Chevy 235, which stated that it would not fit the GMC 302.
In conclusion, while some Chevy distributors are interchangeable, it’s crucial to consider the specific engine type, deck length, and any unique modifications or part numbers to ensure compatibility. Always verify measurements and part numbers before attempting to interchange distributors for different Chevy engines.

How do I know if I have a HEI distributor?

The easist way is just look at it,the HEI distributor cap is taller allowing for the built in coil in the cap. The non HEI cap is much shorter & the coil is external.

When did GM stop using distributors?

It depends on a specific company and sometimes a specific line of cars. Many GM vehicles had theirs phased out around 2005 or so.

Are small block Chevy and big block Chevy distributors the same?

These distributors are interchangeable among standard GM Small-Block and Big-Block V-8s. For tall-deck engines, use adjustable slip collar distributor P/N 10093387. NOTE: Melonized distributor gear P/N 10456413 is required on all Chevrolet Performance crate engines, or serious damage will occur.

How can I tell what type of distributor I have?

If you can get to, or remove your distributor, you should be able to see product numbers or visible markings on the outer casing. Failing that, a distributor can often be identified visually, so sending us details of the car and photos of the distributor should allow us to identify the exact model you need.

Do SBC and BBC use the same distributor?

Distributors are interchangeable but the advance curves are tailored to different applications.

Are all SBC distributors the same?

All chev V8 distributors are the same. Even SBC and BBC are interchangable. Except for the 348’s and 409’s.

What year did GM switch to HEI distributor?

High energy ignition, also known as H.E.I., is an electronic ignition system designed by the Delco-Remy Division of General Motors. It was used on all GM vehicles, at least in the North American market, from 1975 through the mid-1980s.

Do you need special plug wires for HEI distributor?

It’s not mandatory to run 8mm wires with HEI, they didn’t come from the factory that way. You can’t run solid core wires either b/c the noise will interfere with the electronics. Personally, I like a good heli coil wire from MSD or Taylor, had good luck with both.

What is the difference between an HEI distributor and a regular distributor?

The HEI distributor is still an inductive-discharge ignition, but exchanges points for an electronic device called a module. Since this system produces more voltage and amperage output than a point-type ignition, it requires a larger-diameter cap to prevent voltage crossfire inside the distributor cap.

What goes bad in a HEI distributor?

A common HEI malady is for stray voltage to burn through the rotor and to ground through the small mechanical advance weight pivots. The evidence is a rusty-looking iron oxide film on the inside of the rotor and distributor cap. This is clear indication that the posts will be badly worn.