Have you considered one of the Toyota diesel engines? Once you find all of the parts there could be alot less hassle in the conversion. Some good info can be found here:
www.toyotadiesel.comI have a 2lt in a 1987 Toyota that worked out quite well.
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Andy
1987 Toyota PU 4x4 with a 1995 2LT turbo diesel (its for sale if you want it)