I have a 97 80 Series 40tu Ann. with 138k. I have baselined the coolant system and axels and fixed my leaks. I am running a little rich at start up and burning some oil. I have done the color indicator test on the coolant system and it looks good. Long story long, I have noticed a lot of people installing the turbo have fresh rebuilds (makes sense), some are just updating coolant and fuel systems. Can anyone recommend (outside of a rebuild) what should be done before spending the money to installing a turbo? It will make my decision process a lot easier. I know the kits are hard to come by but I really really want one...I am not capable of doing a rebuild.