I' m new to the forum and new to ford trucks too. Just Picked up a 78 250 custom 4x4 ex DND truck (Canada). She had a salter on her for the last few years and it took a toll on the back end. I need a rear diff cover ASAP many small holes. I just want the cheapest one out there nothing fancy it's just a work horse. Can't seem to find any around. It's a budget build just want to get her on the road.

 

1975-1992 Ford F250 Differential Cover - Driveshaft & Axle - CSI, Rear 75-92 F250 Differential Cover - 5322-03173840 - PartsGeek

I am sure you can get a none chromed cover cheaper, try Rock Auto and Dorman products.

 

1985 was the last year Dana 60 rear axle was available in F250's, replaced by the Sterling 10.25.

Same Dana 60 rear inspection cover: 1961/85 F250 / 1975/2013 E250 (Econoline).