Those engines are as close to bulletproof as almost any engine can be. 2 things to do to it are to replace the original timing chain and gears (they are/were nylon or plastic gears and crumble with age/use); the other is to clean out the oil pan.
Where in Va.?
'81 Scrambler w/ FI 360 AMC, 33x12.50 BFG M/T's, 5" of lift, ARB'd Dana 44's F & R, Dana 300 clocked & twin sticked w/4:1, Warn XD9000i, etc...
2002 Grand Cherokee Limited, 2008 Overland Grand Cherokee, a 1976 CJ-7 in pieces and 3 more off-brand 4x4s...............