[Accelo]

The early trucks had this end piece riveted onto the cross-member.
The only method to get it out was to hammer one side forward and the other back. This spread the frame slightly and knocked all kinds of dirt and crap loose in the process.
Later ones were bolted.
To get these out easier, I just loosened the bolts, at the cross-member, and removed the ones from the frame. Made it a lot easier to complete the R&R.
The bolts came in from the top and I didn't have to remove them from between the frame and cab to get the cross-member out.
I never did determine exactly when this change was made.

Nothing wrong with welding to nuts to the top of the frame. Typically one doesn't have access to pull this off like you do.