Never heard it called a gen 5. I'm guessing you mean 78 and up. If so, it'll fit. The ones I've seen though required getting rid of the A/C box on the firewall....if so equipped. Other than that it's a matter of engine mounts and a set of heavy duty coil springs. One other thing to consider is the diameter of the power brake booster. I'm not sure if that has to be replaced with a smaller one. Most header companies make headers for the swap.
Yes..Th400 tranny runs well with it.
pretty much any 454 exhaust manifold will fit
it should be any 4 bolt main small block, like a 305 350 383 400 327 you could even upgrade to a big block, but you may run into some trouble with engine mounts.
Actually the complete distributor will fit from the small block to the big block.
Yes.
No.
a 350 is a small block those heads will fit on and Chevy SMALL block not a big block
no
Yes it will fit. This distributor will fit all small block and big block Chevrolet engines.
yes
There is not a 350 engine known as a "big block". If the caprice and the truck are the same year it should fit perfectly.
The AC Delco PF35 is a direct fit for a Small block Chevy V8. It also may fit a Big Block.