you neeed
engine
k frame
loom
computer
memcal
dash
trans
new mounts (two engine one trans)
headers or equilivant and y peice
front half of a tail shaft
radiator
and while the engine is out replace everything you need too and anything that will envolve removing engine later on if it could go wrong
unless your are able to do the conversion yourself or have too much money to play with its not worth the cash you might as well start with an already v8 car and play with that in my opinion