what would a 340 30/over factory 3.31 stroke be 344cubes? 3100 barracuda with driver.been 6.84 et @98mph 1/8 mile/ with otb eheads/rpm air gap/750 carb/258*/268*@50 roller cam/kb pistons/10.0 compression/power glide trans.Bring the big block on with = parts and watch what happens.