It's a mild build, reconditioned crank and rods, balanced assembly,.40 over, CR 9.5/1, stock 340 "X" heads, Comp XE275HL cam, Performer 340/360 (non-EGR), Holley Avenger 670 w/ e-choke carb, Stock HP manifolds, stock valve train, MSD Billet Distributor w/6 AL...