So to my understanding, the only moving parts in the engine are the cylinder heads and the pistons right? So technically if the block isn't busted open I can just replace those and be ok? I'm assuming I may need a machine shop?
Maybe. If the damage is limited. There may be a hole in the cylinder walls or through parts of the block. You'll probable have to do something about the crankshaft.
If you want to try to save the block pull the heads, if it isn't going to work it's not completely wasted, it'll be easier to pull the motor out.
Or find a short block already rebuilt if the cylinder heads are ok (long block is a complete motor, short is usually just the block minus heads.)
Personally I'd try to find a used replacement. Put all you efforts in a direction you'll know will pay off with a running jeep.
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