LarrBeard is right on the money. The basic block and head are the same as in a CJ, but the accessories are the difference. Fording kits were installed meaning everything that pulled outside air in, or vented to the atmosphere were piped through the air cleaner, and the snorkel. The electrical components were waterproof, 24 volt and heavy duty. The front engine mounts and radiator were tied together with rods, so the power pack could be pulled as a unit. The grill was on hinges, and would be lowered for ease of engine removal/install.