Doctor diff axle question-

So I sent the new to me 8-3/4 abody housing out for a good cleaning before assembly on my 66’. I purchased Doctor Diff BBP axles for stock width and green bearings. When my housing came back the machine shop took out the axle seals from the factory. With the green bearings that are sealed..... are you running additional axle seals or not and don’t have leaks. Doctor Diff says it’s a good thing to use them. But do I have to with sealed green bearings. So again what are you running with these bearings?


Also, I’m removing a 8-1/4 rear to install the 8-3/4” I know I need to try the fit. Any charts available for yoke to centerline on these two axles? Trying to figure out fingers crossed if I will have to cut driveshaft or not. I thinks it is a 1” difference. 8-3/4” needs less shaft than the 8-1/4”. Anyhow thanks for reading.

Syleng1