Not really an upgrade but while I had it out I would: Replace RMS (if leaking), oil pump and screen(depending on mileage), oil pan gasket, any other gasket/seals that are suspect. Much easier to do a thorough job with these things while the engines on a stand.well i don't want to put too much inton it yet, i have other projects that need to be done on it. But thought since i had motor out, i would do a few things to it.