I used to have a 6.0 and have a real nice 6.4. I have always wanted an OBS though. I finally found one nice enough. I got it back on Jan 4th. This may have been someone's on the org's truck b/c I think I remember seeing it for sale in the classifieds once, maybe not.
Anyways, it's a 97, auto, 144k, 6", 37s, TS 6 POS.
I recently put a new front fuel tank in it and fixed a fuel leak on the bowl (water in fuel sensor fixed with 1/8 NPT pipe plug). While messing with the fuel leak situation, I replaced the lift pump, and deleted the EBPV with a new outlet housing and delete pedestal. I can say I actually miss pulling the 6.0 turbo after this.
I also put a big washable air filter on to replace the dirty 6637 and installed a Riff Raff HPX. Definitely a great addition along with EBPV delete.
Next on the list is some new 37s and the strictly diesel dipstick fitting replacement (once I work enough courage up to leave the inner flange at the bottom of the pan).