One way to go is to just buy a short block from someone like Texas Speed (or who ever), then buy a good set of heads and a Fast intake. Send to someone like I did (Pete Incaudo) for cam design, porting and port matching.
If you get someone that really knows what they are doing, like Pete does, you will have a screaming machine.
Pete did my 402 in my Silverado. A mild, daily driven motor in a Silverado, that runs 11.14 to 11.16 ET's all day long, hot lapping. He is a Master !! This is a motor the wife can drive to the grocery store.
This would be an easy 10 second motor in a Vette weighing 700 lbs lighter.
Look how easy this motor runs near a ten second run. This is on little 255/50 Drag radials and I just roll out a few feet and nail it. This is a 4000 lb truck. http://s160.photobucket.com/albums/t...b1117mpeg2.mp4