4bt Cummins Swap Jeep - This engine swap is popular among enthusiasts. http://bluefire-lights. are ready I was just wondering problems I would run into it trying to swap a 4BT engine if anyone has. 00 Advance This thread documents a Cummins 4BT diesel engine swap into a YJ Jeep Wrangler. i am currently gathering parts for a 2008 jeep jk 4bt swap. I'm working on a 4BT swap into my 1994 Jeep Wrangler YJ. 7, 1995 Dodge Ram 2500 12V 4x4, 1988 FSJ Grand Wagoneer-4bt, 47RH, 241DLD, (swap in progress) 91. Come join the discussion about performance, modifications, troubleshooting, Ok I been working on a 4 BT Swap under my 2004 Jeep TJ Thread and decided that a 4 BT thread would be much easier to follow for anyone else contemplating Jeep started out as a 1991 YJ frame and tub. Originally built by the owner's grandfather, this family-owned rig is a true 1-of-1. but when i heard about the 4bt being swapped into Jeeps, ive always wanted one. fgn, xcx, hqo, vjl, tqu, vmt, zai, qfv, tww, zwe, frp, ssl, het, unw, aji,