Here is the situation. I have a '91 V3500 crew cab 4x4 SRW with a 454 in it that I am gonna get started on redoing little by little. I've had the truck for a good year or more and its just been sitting. Motor is all stock. It has some oil leaks here and there. It starts up, and runs (loud...dual 3" ehxaust all the way back). Doesnt seem to smoke, etc. I havent driven it on the street other than real quick back and forth. The radiator was shot. I am gonna pull the motor out to replace the rear main, and other gaskets, etc. My question is, what tests can I do to see if the engine is in fact good? Anything I can check or pull part to check I dont mind. I dont have the $$ right now for a full on rebuild of the motor, so if its bad, it will sit for a while. I just dont want to dump $$ into it replacing gaskets and the time to put it back in if its got issues. I may have too just put it back in and run it, but if there are some tests/checks I can do to help eliminate some possible problems, it would ease my mind. Since I got it I have tossed the idea around and would love to convert it to diesel as Cam was thinking about, but the funds arent there right now, so I am gonna have to take the truck down and redo it and run the big block for a while Thanks!