The fuel pump rod hole is 1/2 and the two drain back holes are 3/8. You might have to finish ream the hole and do something to keep the debris out of the engine unless you have the block apart for cleaning.
Yes it will fit right in there. A small block Chevy is a small block Chevy. The only thing that is different is the fuel system. All small block Chevy engines are the same it does not matter. Chevy did not redesign the engine blocks until late 2000. But in your case the 2 ingines are the same. Put it in there.
It is fuel injected. Chevy quite using carburetors in late 1986. from there on everything is fuel injected.
Chevy built a 302 in the late sixties. It used a 327 block with a 283 crank.
late 1986.
Late 1987
Late 1987.
Yes it is. anything from late 1987 to date is fuel injected.
Late 1987 is when GM. changed fuel system to fuel injection.
Late 1996
YES fuel injection started in late 1987
That year has a Carburetor on it. They started using fuel injection in late 1987
Fuel injection. Carburetors went away in cars in the late 1980s.