EFI for my 65 Barracuda -- 2bbl or 4bbl

First timer here, I want to swap my 65 to EFI. Currently I have a 2bbl holley carb on a mid 70's 318 with stock exhaust manifolds.

1. Should I swap to a four barrel intake or is the stock two fine or will it even make a different with my stock exhaust?

2. Best place to put the G-shock fuel pump in our tiny engine bays?

3. Will it effect my linkage?

4. Any other advice on efi would be really appreciated!

Thanks in advance,

Peter