like mentioned before ,read my faq and problem posts as tehy will give you more info than you want ,it is just alot to read at once
for 2500 it is a steal even with a bad engine or tranny ,so don't worry about it, the 94-96 is the best engine to have there are no sludge problems until 97 when the emmisions changed and raised the internal temp of the engine causign buildup nothing prior unless it was onwned by a lazy owner.