Originally Posted by mewantkouki

SR and KA are the same goddamn thing. One makes more torque and marginally more hp than the other. The both have the same shit cast pistons. SR is better out of the box. Stronger connecting rods, lighter, fully counter weighted crankshaft, and larger head bolts. There are pro's and cons to each. KA's make boat loads of torque, but they are very sensitive to tune in stock form. Built neither engine is really going to edge the other out in performance. 500whp in an S-chassis isn't practical on the street anyway. Pick what you like and stick with it. You can have a built bottom end ka for what you spend on a stock SR swap. (Not that it matters with the modest power goals most set forth on this forum.) I've owned, beaten and broken both past 350whp. There isn't any advantage to either. SR is much more expensive in every respect though.