I am gettin ready to build a new engine for my truck.. I have 429 cj code r heads.. I have 429 and 460 complete motors,, need to know what cam and pistons to run to get the most from the heads,, I drive the truck daily use for towing, hauling, have 373 rear end c 6 trans with gearvendor overdrive..the 460 block I am running now is ok but the heads are not performing right .running a wyn intake mathed to work on Cj heads any sugestions??? Jerry