Having just done this, and struggled with the lock washers, the square nut idea sounds good.
But, Stan, I’m confused by the 7/16 socket. It fits the hex nuts, wouldn’t that be a larger socket for the square nuts?
And that tubing trick looks great. But I found a deep socket necessary.
Anyway, there’s sure a lot of bolts in those beds!
Charley


~Charley
1954 Chevy 3100 with 235
“Bud”
Follow along in the DITY
1963 Chevy half ton stepside short box 230
1954 GMC 3 ton 302
And several more Chevy camper and work trucks 1979 1987 1996