Will a 2H engine fit in a 1979 HJ45

Yep I did it to a troopie years ago, BUT you need the later 4 speed, change (move or add) the gearbox mount, and move engine mounts. You can use the same radiator but you will have to turn the thermostat housing around as the top rad hose in on opposite sides of the vehicle for H and 2H.
Can't remember if I had to change the drive shafts but I had a donor vehicle anyway and all up the local mechanic did it and towed the doner vehicle home for $300 bargain.
The earlier 4 speed was geared a little taller as well. You can go a 5 speed. There is a version that still has the transmission brake on the Transfer case or go a later version and change the rear diff to handbrake version from a 62 or 75.

Ahh thanks heaps mate. Yea sounds like a bit to much work just to get this thing running. Just cant seem to find a motor at the moment. Thanks heaps for the fast response.

hey "twoods" ..
Jump on to a web site called LCCOL.ORG ........ you will find it VERY useful for any "cruiser" stuff
Cheers