84 Camaro EFI to Carb Swap?

I have a 1984 Chevy Camaro with a 350 in it. Theres a bad knocking noise coming from the engine compartment and I'm uming at this point its a rod knock, I have yet to verify but I have already dealt with valve tick w/this engine so the tone is completely different. So anyways I've been looking for a motor to replace this one, and I'd prefer to put another 350 in it with the bolt on mods I've got. I've only checked one place for a carbed or tbi engine and they didn't have any, They do however have several low mileage efi 350's. Now my question, How difficult is it to convert from EFI to Carburettor? Can I use my carb/intake manifold/distributor from the old engine? I am aware that there may or may not be a port on the block for a mechanical fuel pump whereas my engine now has a mechanical pump, regardless I am prepared to purchase a new electric pump. Will I have to keep the serpentine setup or can I swap to a v-belt? Any other info would be greatly appreciated. Thanks.