Okie Doke.

First things first. Hit the classic Tech Forum on BADRAP.NET

Second get over to Summitracing.com and start looking for parts. My recomendation is that you get a set of forged pistons and somw H bean rods to start with. Then get the Edlebrock BBC heads and matching cam\carb\intake setup. this should get you started. Be forwarned that this is going to cost you about one third to half again as much for everything over a small block.