I swapped in a 350 in my 725 and the rest of the drivetrain is stock. its not real good on the highway for long drives but works good offroad when you can drive slow. on one of my 715's Im using a 3/4 ton chevy 4x4 frame and running gear for better driveability on the highway. on the other Im totally boxing in the stock frame and contemplating using a hydraulic pivot just behind the cab to make the bed rotate independently from the cab plus 5 ton rockwells and 4 wheel steer. probably going to be running a whipple supercharged 496 with an auto od and an atlas transfer case with probably 3 gears. I built a 632 bbc but after the Col. fe, I sold it and want something with alot of power but still manageable on road too.
I road in several trucks that were stock and liked the way they did but parts are expensive and hard to find so i took the cheaper way out and parts are readily available. an overdrive tranny and a different transfer case would be a big plus in making your truck more of a highway friendly truck and you'd be better able to stay up with traffic without pushing your engine to hard.
Last edited by dave; February 22nd, 2009 at 05:07 PM.
Reason: butter fingers
67 M725, 67 M715, 68 M715