Quick reply Rich for ya Rich. Use the EQ (Enginequest) ch318b's they are Magnums that are less $$$ and perform better out of the box with no porting. They are torque producing monsters. With that being said I would get a 360 crank and turn down the mains to 318 size and use a cheap $$$ cast piston with a little off the top--it can be done. Now you have 349 cubes and cammed right should make an easy 430-440 hp but more importantly will make tons of torque somewhere around 450 ft./lbs. Use the RPM Air-Gap and you will have a cheap but fun and awesome engine. I am building one for myself actually. Hope this helps J.Rob p.s. Check the link if you want to hear a 360 with EQ magnums on the dyno. 360 Magnum on dyno