And to add, the CLeveland doesn't accept fuel injection without either more money (since it will have to be custom) and the parts from the 351C and 351W wont interchange. I would go with the 351/383 route. Hell you can get a nice set of aluminum heads for barely over $1000 new. Instead, go with the Iron GT40P heads. You can find them cheap enough new if you look around. I remember seeing them for around $250 bare. I'll look for where I saw it at. Hell you could add these even, I would.
http://store.summitracing.com/partdetail.asp?part=FMS-M6049Y303
http://store.summitracing.com/partdetail.asp?part=FMS-M6049Y303