My son had a 1971 CJ5 with the gm v-6 (225?) it was a very good mud vehicle and decent in the snow. When he blew up the original engine, he replaced it with a 215ci aluminum Olds engine. This made a pretty neat rig in many respects but the engine wasn't as torquey as the v-6 and not as good in the mud. He replaced that with a gm 231 v-6 and that made it, once more, a great mud rig. None of the running gear remained original because the stock diffs and shafts were too fragile. The old Jeep was never a luxury ride but it could get around off-road. GD
