Being the cheapskate that I am, I opted not to buy some fancy diff covers. Instead, I reinforced the stockers that came on the axles.
The stock D60 cover that came on the ’99 E350 (Left side) measures at 0.130″ thick
The stock D44 Cover that comes on the ’78 F250 (Right Side) measures at 0.170″ thick
Since both covers are pretty dang thick, I felt that they only need a little protection around the ring gear portion of the covers. So I cleaned up the covers with a wire wheel:
And added some ¼” x 2 “steel to the ring gear area:
I might add more steel later on, but I’ve got a feeling that these will work just fine for the wheeling I do. If I add more to them, I’ll update this post. (Edit: They were fine)