I would ask to pull the valve cover and take a look, then do a comp. check after turning it over a few times and see what you got. I have a junkyard motor, it runs great! Just as a precaution I changed the timing set, water pump, oil pump, and all the gaskets when I put it in. I hate leaks, and I don't have a single one :-)

1986 4X4, 1991 22RE, 5.71 gears,ARB Rear, aux fuel tank, 3mm O/S TB/intake, engnbldr cam, LCE header, magnaflow w/2.25 exh. custom 4 color paint job :-P 33X12.5 Goodyear MT/Rs