I put a 1HD-T into my 1999 HZJ75 and I love it.
Use the larger 1HDT flywheel with the Isuzu 300mm fine-spline clutch, for a bolt-in setup. You will also need to source the 1HD-T air filter housing lid.
A leaf spring can be designed to flex well but they need to be specific. A spring for a soft top 40 without any accessories will need
a different rate than a 40 with a hardtop, roof rack, bumpers, winch, aux gas tank and a tire carrier. There's...
If you are going to spend most of your time in countries where you drive on the RHS of the road, then fit it on the RHS of the vehicle too and visa versa for other countries.
Generally the thinking is passenger AFAIK, in case you’re pulled off to the side of the road and want to open the awning to make lunch - or have some shade in case you’re broken down.