I bought a 1987 Toyota HJ60 wagon that had already been imported into the United States. I had a full frame off done and the engine swapped out for a 1995 Toyota 1HZ 4.2 liter inline six. Here are some pics.
Have you checked the crank bearings on your motor?
A lot of 80 series cruisers in this part of the world (NZ/Australia) had issues with them. Might be worth looking into.
Apparently a swap to good ones is all the insurance you need.
is it a tight fit in the engine bay ? i spend half my life working on HZJ 75/78/100 cruisers. i haven't seen anyone put a 1HZ into a 60 before. there is also an engine called a 12H-T which drops in place of the old 2H diesel. the gearbox ratios seem to suit this engine. top gear is only 0.838 to 1. for some reason toyota didn't use all the available spline on the transfer input. they do tend to strip the splines there a bit. otherwise,they stand up to it all pretty easy.
fwiw, the 1HZ fits very well in the 60-series chassis. we've done a few of these conversions and have two at the shop right now, with another 2 coming in. we're also doing a couple of them into the 80-series rigs. mostly with turbos on them.
Very nice, never seen a 1hz put in a 60 series before. How come you didn't put It In a us fj60? Was it hard getting the motor over your way? I guess you have the glow system and diesel diffs. Have a real sort spofor 60 series - if my wife didn't want air bags we'd have one as a family car