proper way to measure for rear end u-bolt length?

go-fish said
@abodyjoe Dis you get them from Mancini? I’m going through the same deal with the tie down plates rn.

yes advertised as 9" which would fit and i'd trim after if needed but these damn things are 10" and threads don't go far enough. was gonna call them tuesday.. probably see if they will exchange for the 8" and they will fit like i want..lol