This dissy fits a wide range of mainly 77 - 87 era Chevy Small Block V8.

Its id is easy as its running the vacuum advance out the side.. where the air hose goes on. 

This is a Genuine USA remanufactured carby as good as new can be.

and it has a 4 pin Dissy Module..

AND.. the cap has the coil in the lid...

.. AND but wait.. theres more..

The Caps held on by 4 spring clips NOT screws.

Commonly found in:

1977-81 Firebird & Camaro with Chevy 305 or 350 

1982-87 Firebird & Camaro 305 but NOT TPI or CFI

also 1974 - 79 Corvette without tacho driver.

and then up to 1987 in the  Camaro and FIrebird with standard V8 and Single 4 bbl carby.

You an probably find a cheap copy of them for a dollar each  on ebay etc but doing the job once is worth the product value along with knowing just what you have.

(NOT for Tuned Port injection OR twin carby Crossfire Injected.)