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Re: Diesel Conversion
Just my 2 cents,
I think I'd stick with the gm 6.2/6.5 if you are not going to tow frequently. They get great mpg but down on power by todays standards.
If frequent towing is needed, you can stuff a 5.9 12 valve out of early Dodge with mechanical pump (rotary pumps seem to be better)and it makes great power, but may be on the pricey side for a decent condition find. You will need a SAE #3 bell housing to mount to th400 if memory serves me correct. Keeping an eye on the injectors is key, as when they get dirty, i.e. poor spray pattern, pistons get hot and drop off ring lands. No good and lots of noise. My father loves 5.9s who also transplants them into tractors!
By the way, he runs veg oil (peanut to be precise) in all of his. If you live in a fairly cold environment, pre heating fuel with be mandatory. Stuff gels under 48 degrees.
He also likes the 3.9 which is basically the 5.9 minus two holes. But as noted by other members, they might rattle your arse to sleep. I hear running an auto tranny really helps. These engines not only were in step vans, but also many came in tractors also. These are not light duty engines.
Damn that was a long post.
Good luck!
Jay
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