Hey Ferm, or anyone that knows diesels

[spareparts]

Ferm or any one with 7.3 knowledge. I've got a 1997 F350 7.3/5 speed 2wd. Going thru a few issues with it, trying to get decent milage out of it. I found an exhaust leak around the turbine housing. Rebuild looks pretty staright forward on the turbo. Whers the best place to get parts. I've got the parts in my cart at Rock Auto, just don't know the brand. Any place better?
BTW, I've already put Diamond Eye 4" exhaust, and the air filter upgrade. It went from 10 mpg to 14 mpg unloaded, highway speed. Still looking for a little more out of it. Seems they don't like the rpms of running 70 +. I have 235/85 16 all the way around, wish I had gone taller. Tach reads around 2500 at 70 mph. 65 MPH on I95 sucks. Thinking about making it 4wd, found a 5 speed/271(?) transmission/transfer case. Need a dually width drivers side drop D60 for the front. I'd rather have the 6 peed if I can find one. .72 OD vs .76. Not much, but combine it with 33's and should put me right where I need it to be