I removed the bar and replaced the tramp on my 1976 5.2 and it still is together and sailing today. I initially tried to put a SS rivet thru the straps, but they got sheered off, or even worse, weakened the strap. I eventually just snugged up the beam starp and watched them closely. d dont recall them sliding out of place, but they definitely flex enough to sheer the rivet and weaken the strap.

Good Luck,
David

The men were amazed, and said, "What kind of a man is this, that even the winds and the sea obey Him?" Matthew 8:27