I recently acquired an 80 model CJ-5 for a steal--$1200.00. Body is in perfect condition--ready to be painted, the tranny, case, and diffs seem to be in good shape-60,000 miles. The guy I bought it from lived way out in the middle of nowhere and was willing to sell it cheap if I would come get it--the only problem with the vehicle he said was it had a "cracked block." This may sound ignorant, but what the heck does that mean--I searched all over the outside of the block-can't find any cracks. So I started tearing into the engine--oil in the carb, and air cleaner. Bad valve cover seal--the valves seem to be in working order..... Anyway, am I missing something here???? What does cracked block mean? Can it be internal? HELP!!! It has the silly 151 GM in it, that will soon be swapped, but it would be great to have it running to buzz around in until the time and money acrue to do the swap.