I haven't read your entire post yet, but a 4BT is a very simple swap and very popular with all the rock crawler guys. A scock engine will give an easy 350lbs of torque. I just happen to have a low hour 4BT set up for a Chevy bolt pattern. I was putting it in my 55 Chevy Cameo PU, a light 2 wheel drive conversion will pull 30-35 mpg, easy. My wife said she'll never drive in it if it smells like diesel. After 3 TDI Jettas and a Cummins powered Dodge, I realize it can't be done. There is no way I can seal up the cab on a 55, so out it comes and in goes a 5.3. The engine comes off of a 900hr back-up generator for a ranch. It runs exelent and is barely broken in. I set it up with a Chevy adapter, manual trans flywheel, 12 inch chevy clutch, 26 spline disk. I have a new truck style oil pan and pick-up. The real trick is to find a virgin engine without any repairs with non-Cummins parts. This engine has never even been washed down. I have $3,000 into the engine. If you don't want the Chevy stuff, I will take off $500. 6BT Dodge/Cummins 12 valve stuff bolts right on, so if you don't mind a 47RE auto trans its an easy, bolt on conversion. A NV4500 Dodge is another good choice if you want to go a Dodge manual trans. You can email me at
zeke5551@comcast.net or 559-9077240 I live by Fresno, CA