I got 472 rwhp, 140hp lost in the 727!!
I see you have a electric water pump and 3 inch exhaust. Is it a belt fan or electric? 22 percent seems like a lot to lose.
yes, Electric water pump and Electric fan, the "dynoman" said there was alot of converter slippage.. With manual he think there would be about 50-60 more hp to the Wheels..
thanks, all i know is 2500 stall speed, 10 3/4" the drivetrain is matching number, if it wasnt i would do a 4spd swap