Ok guys I got a moderatly modified 460 in a mud truck. Had a 850 demon on it which needed rebuilt so I took it off for a rebuild and put back on a 950 Quick Fuel. The demon had the rear power valve blocked and a little larger jet than the quick fuel. the quick fuel still has both power valves in it. The truck is more resonsive to RPMS with the quick fuel but has lost tork espicially after shifting to 2nd gear. This is a 472 with a weiland dual plane intake steel heads. Any ideas.