The bolt in the back is only for a mounting bracket. On some cars and trucks,there is a pivot bolt spacer with a strap connected to it that was attached to the bolt,so it wouldn't fall into the Twilight Zone when the pivot bolt was removed.Not critical on your truck.
Speed


1954 GMC 350
1957 GMC 1/2 ton
1962 Chevy C-30
1952 Chevy 6400 dump bed project truck
'98 Harley FLSTC
'66 Pontiac Catalina
'76 Chevy 1 ton Duallie
'84 Bronco II
'78 Dodge W-200
'81 Toyota 4X4 truck