Thanks, didn't know about the 400s in the motor-homes. I am considering just pulling my 1977 440 out of the truck and just re-building it. I really didn't want the truck down that long but it might be the most cost effective way to do this. I would still like to hear what you guys think about piston, cam, convertor, for a truck which does a fair amount of towing. Remember half ton, 727, 9.25 with 3:21 SG...