Find a Vortech BB. I belong to a JR Fuel team. We were pulling the race trailer with pumped(?) 440. The Vortech just puts the 440 to shame. The race trailer is some were around 17k pounds. The Vortech will pull the trailer up the grapevine at 45 mph, cruise at 65-70. This is a stock vortech in a 98 3500 Chevy. I'd have a tough time beating my Dads Vortech in his 99 RV with my 292.
Larry
