Open trunk, put fan in it, close trunk, done...
Or do you mean an electric fan for the cooling system?
if so, Yes you can. make sure it has the same diameter as the original.
Yes you can.
The 305 was standard in an 89 Caprice Classic, so the answer is obviously yes.
yes
no you dummy
yes u can
No
Yes you can order 1 from Dakota digital for about 650
Remove oil-filler cap and add oil...
The exact same one that is in it now.
Put a 4bbl carb and intake on it. If I remember they came with 2bbl
About any GM will go However if it has computer the engine must match.
It is very possible i have seen it done dozens of times.