Your gonna max out 250-260 on the stock block reliably, If you want more your gonna have to build it. And you will have to order custom pistons, mine are custom with 7.5:1 compression. Don't run more than about 9lbs of boost stock. if you go more, god rest your f22's soul. also, you gotta have an lsd (obx helical good) or you will break differentials left and right.