It was rebuilt before I bought it and what seems to have happened is that the person milled the heads, but didnt have the cam rests bored. As a result the straight cams were running on warped rests and the first time I stressed the engine the gaskets blew. The block was perfectly straight thank God. The heads we put on are purchased rebuilt ones, not the old ones "fixed".

89 Montero LWB 5speed
31" BFG MT's
5K on Rebuilt 3.0 Engine
189K on Chassis
Electric Fan-ectomy
Brushguard