Shoot, you can make a 521ci 460 for the cheap. Buy the rotating assembly ($1699) from Brian at AD Performance ( http://www.adperformance.com/) and you can put together a 521 for under 3 grand that will make such crazy TQ that you will have to carry kleenex on the first few rides to clean yourself up with. Small blocks are for small dreams, big blocks are for the big dreamers. Dream big, live big.