I'm inspired to ask this here--haven't had much luck on the Chev truck sites. This pickup was given to me "as is" to pay a debt of $350. It's in good shape otherwise but has one or more bad rod bearings. The engine has good compression and I want to know if the bearing or bearings can be changed without pulling the engine. It has duals, so at least there's no crossover pipe to deal with. Looking at it from underneath, it looks like there's enough clearance to be able to drop the pan. However there's a deep crossmember under nearly the whole front of the pan that looks like it would then prevent me from easily getting at the front rod bearings (if that's where the knocking is). So would I have to raise the front of the engine to get better access? Or if I had to do that, would I be better advised to pull the engine and get it upside down on a bench to work on it? Probably a rebuilt short block would be ideal, but the top end is in such good shape I hate to tear it down more than necessary. Thanks, Ray Mac.