Not a bad idea. Should not be hard to find a low to mid milage engine around. Then plan on building one just for your truck. Doing that now with mine. The old 350 had 230k on it. Found a running 305 for $500. Did the swap myself. Have been buying all the go goodies for a while. Pick up Lingenfelter's book on modifying small block chevy engines. Their is a ton of useful info in it. Yeah it's for building hot rod engines but. It takes you thru all the aspects of a motor build. Where to find the hidden hp and torque!! Not just to throw a 60+hp cam to a 350. Roller rocker arms,exhaust, oiling system, heads, etc,etc. It's all there He even points out the best part#'s. As i said a ton of useful info. Well it was for me. Already built a smokin bad ass motor for my old iroc. Rolling 10-15mph and punch it she would go side ways. And gas milage went from 18mpg to 25mpg. That's with the 350! It had a 305 in it. Hope this helps.