Your reply reminds me of another issue connected to the vibrating bonnet.
The Vibs wore out the bonnet latch loop to a point where it was half cut through.
That latch loop is spot welded into the Bonnet frame.
I was able to tig weld the loop wear though.
I was talking to the girl who owned the truck prior to me and she was saying that it had been a great truck but the bonnet flapped a lot????????
I guess it was no coincidence that the rocker cover was lined in an inch of sludge.