i will look into all that alittle more... here is the specs
4.250 Callies Compstar 4340 forged steel crankshaft
6.385 Compstar H-Beam Connecting rods with ARP 2000 Rod Bolts( Bushed Fit Pins )
10.4:1 w/ 118cc SRP performance forged aluminum pistons, with pins and locks
4.500 Bore
heres the link to the kit.
http://www.cnc-motorsports.com/produ...D=27083&CtgID=
heres something to read.
http://www.roadsters.com/bbc/#bore
further investigation looks like this kit is for a 502 bowtie block.