were introduced 20 years ago typical engines used to be 283 to 327 cubic inches not ... with the popularity of larger stroker engines and more efficient cylinder head/cam ... horsepower and torque out of today s engines don t believe it check out the dyno ... designs optimized for today s bigger engines industry leading computational fluid ... maximum torque for street performance engines · permanent mold casting process for ... for gm vortec and standard small block chevy heads · dyno proven to make as much as ... street drivability standard small block chevy heads recommended accessories · holley ... width application 1957-86 262-400 sb chevy v8 1987-later w alum heads 262-400 sb ...