gotta spare 300sd engine?
Actually, I want to do just the reverse conversion.
I have an 81 suburban that I use for towing. It's engine is tired and leaky. I though a nice 300sd engine & tranny to replace the 350 would be a very economical choice, fuel-wise for anything long haul. It's 0-60 will be poor at best under load, but the goal is to make it from point A to B cheaply, not quickly.
If you still have the dead motor & tranny, how much do you want for it and where are you?