hemijoe thats an out of the box combo! My kinda motor,but I will admit that there are easier and cheaper ways to make that kind of power. In fact the same 318 without the extra stroke and a stock bottom end did make 400 h.p in a magazine build. Mag heads,stock 318,kb 167 piston and an air gap got it over 400 h.p. A similar thing was done with 302 heads that were ported and it had a slight edge over the mag version. BUT ,the mag version had stock heads and the wrong cam IMHO,lol.