caveman said:Find a set of '68-'73 351w heads (they have bigger valves and smaller combustion chambers,) ream out the exhaust ports (there's a nasty little emissions hump that greatly impedes flow,) get a single plane 4bbl intake and 600cfm carb, get a Trick Flow cam rated for 2500-6000 rpm (be sure to buy the compatable lifters and valve springs.) If you're rebuilding the block, don't use TRW pistons; they will reduce the compression ratio. Buy the rebuild kit that doesn't include the pistons and buy Silvolite (Keith Black) pistons. They retain the original compression height and they are hypereutectic(sp) or in other words, they have more silicone content and do not expand as much as regular cast or forged units. Use an MSD ignition and headers. and that should about do it.