That KRP is a great motor-needle bearing camshaft, etc, and I assure all personally that one of them has made 440 HP on NHRA gas with an ex-Pro Stock Truck (Chevy) head and a single 850 four barrel. Turns 10,000 and runs over 160 in the 1/4 mile in a 1200 lb class-legal dragster -there a few more with a variety of intakes (Webers, port injectors) that have to compete with the purpose-built way more modern Mopar midget motors (Econo?) and they aquit them selves nicely at the drags.