We started with a stock 350 Olds engine which produced 180 HP with 275 TQ 8:1 compression. We installed flat top pistons and a solid flat tappet Crane cam. Then we added Olds 455 heads with some mild porting. Topped it off with a Edelbrock intake and Holley 670 Brawler carburetor. At 9.5:1 compression this 350 now makes 340 HP & 390 TQ.