You should try this
400ci 10.25:1cr
hyperutectic pistons,with moly rings
6" I-beam rods with arp rod bolts
274H xe cam
gear drive or double roller timing chain
1.6 roller tip rockers
Performer rpm intake
670cfm street avenger holley
hei igntion 50k coil
keith black pistons(KB130)
http://shop.enginekits.com/osb/itemdetails.cfm?ID=795
I-beam 6" con. rods
http://shop.enginekits.com/osb/itemdetails.cfm?ID=2251