X4 I have a stock stroke 363 with W2 heads 11 1/2 to 1 comp made 549 hp and 450 torque, my present motor : R3 Block, Indy 360-1 heads 4 inch stroke comes to a 408 91/2 to 1 comp . made 539 hp and 502 torque because of the increased torque I am able to run a 4.10 gear my 60 fts stayed the same vs 4.88s I ran with the 363. Didn`t need all the gear because of the torque increase.