I have an 80 vette and am looking into the Fitech Go EFI system.  Some good videos on youtube about it.  Simple plug in and self learning.  There are other systems out there some similar to Fitech and others that look like one heck of an undertaking to me.

Sarge 81 has used that set up, message him, he knows a lot about it. You also need to go with an electric fuel pump because of the higher pressure needed. Good luck with it.

I used the FAST efi system. Other than putting the pump in the fuel tank it was easy. The only issue was the map sensor. FAST makes a great unit but the one place they cheaped out was using a pos sensor. I got a delco unit at PEP boys and it has been flawless ever since.

I put a FiTech Go Street EFI on the wife's '87 Olds Cutlass 442 last year. The engine is a 350 Olds V8 with a pretty lumpy cam. I'm very happy with the unit. It is very affordable and is self learning. I did have one small glitch, but a couple of simple taps on the touch screen to reset and change the camshaft selection the unit was up and running. I opted to use a in-tank fuel pump with a C5 Corvette filter/regulator to supply the correct pressure. You can do that or they have a Fuel Command Center that takes the fuel from your stock mechanical fuel pump to fill up the sump. Inside the sump is the hi pressure pump and regulator that feeds the EFI unit.