Dale I set the deck dead on. you can play with head gasket to get that right. as for cranks don't forget it's + or - .015 most everyone goes + .012 now for pistons make sure you use a floating pin piston...little motor with low Hp needs to get rid of all the friction it can....I know ran a 230 6cyl for years (dad still dose) & set 5 IHRA records with it. I now have a P/SA 307 cutlass that can run 12.60's on these low Hp engines frictions kills! oh & don't forget dry film coated bearings.....friction.