Hello,
I've recently been interested in diesel engine conversions.
My dad bought a 2004.5 Chevrolet Silverado 2500HD Crew with the 6.6L LLY Duramax with a Alison transmission... man it hauls. We had a trial of the Bully Dog tuner.. holy crap..

However...
My truck has a 134 cubic inch over head valve four cylinder. It produces around 115hp at the flywheel. Its mated to a Borg Warner T-5 5 speed manual transmission, and its got a 3.73 rear end.
Its a 1994 GMC Sonoma regular cab short box fleetside.
I've been trying to find a suitable diesel engine to swap into my pickup. I've been looking at the Cummins 4BT briefly, but from what I can gather it is too big for my application.

I'd be looking for an engine that I can do slight work to to make it put out more power, but not a significant drop in fuel economy. Something thats got parts readily availible. A simpler engine, I guess, would be nice too, less electrical and stuff. Factory turbo would be nice. I've got a few years to work on my pickup so I'm not overly worried about time. Space might be an issue with my truck, but as it sits now, theres a big shroud on the radiator, and I eventually plan to swap in electric fans, which will clear up a good bit of space. It was sitting in an airport parking lot for a year or two before my dad talked to the owner of the building and got it for me. Got it for free. It runs good, but I'm just considering my options.

This is the best photo I have of the engine bay.


And here it is when we towed it home.


It needs body work, and I'm learning that too. Also planning on putting full airbag suspension under it, which would help with the weight of a diesel engine.
I'm 15 years old, but please don't think of me as some young punk. I've grown up by cars and trucks all my life, and I'm taking automotive courses, and fabrication courses aswell, and I can stick weld, mig weld, oxyweld/cut and use a plasma.