340 High Compression Pistons
I purchased the heads new in the box ready to run for less than half of retain price that's why im running them and will spend about $1500 having them ported and tunnel ram port matched and comp valve job performed . Im not running this on the street this will be used at the track only , cam is a Crower solid lifter flat tappet
544/558
304/310 or duration @ .050" I 250 E 254