I can remember when they had a group buy on SVTP where you could pick up a GT block for $1,900. Of course I was broke when this happened. My nephew picked up a set of GT heads for $1,750 that were ready to bolt on and go.
Im super happy with mine. One of the PTWA blocks from a 2011 GT500. Just be forewarned that they cant be bored, so if you mess up then cylinder wall you have to sleeve it.
I was finally just able to pick up my GT block that already had the machine work done for it to go into the lightning. GL with your search. Its definitely going to cost you