Guys,
Thanks for all the input for the differential cover. R46 I liked the chopped pyramid idea and spent some time determining material sizes and angles I would need.
And I looked at trailer fenders ordering this one...
Amazon.com: CE Smith Steel Trailer Fender:...
16 gauge with radiused edges.
Cut the fender down to the right length and made some sides to close it to the floor then welded them in.