A bigger breaker bar, or cheater pipe????
Extension so you can stand up in the bed and try to hold it?
I've simply tack welded them to the bed before.
Doesn't take two people and it doesn't ruin the bolt for reuse.
Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.