Get a coolhead from jeff at F.A.S.T. with whatever domes he recommends, set that timing plate to 4 degrees, and you should be over 45 hp for damn sure. I am making 58.93 to the rear tires with stock carbs, no porting. just vitos superstock pistons, CPI inframe drag pipes, timing plate at 4 degrees, and a coolhead with 20cc domes. and its on pump gas.