I have negative opinions of Chevy diesels but my dad just told me where there is a 90 or so diesel pickup for sale. He said its been there quite a while so maybe I could get the price down. My dad said its fairly high mileage, guessing over 150k so what would I want to look for? What would wear out on the motor? How about Diesel hop ups? I was planning on building up the 350 in the truck I have been planning on getting(waiting on the guy but have been waiting weeks). I would have to hop up the 6.5 if I got it.