Well, in order to do that he would have to buy the C5R block $6k, the C5R heads $5k custom manifold for the C5R heads ~$2k, plus a rotating assembly ~$3k-$5k have it built, tunned, dressed up, and he's looking at $20k when he can just get the LS7 out of the 06 Z06 for less than $10k....not to mention that LS1's them selves can be bored, stroked and poked to 450+cubes!