9in ford help,tucking 18x12 budniks with 5.5 backspacing and 55in rearend?

[fillpot]

Guy's took the rearend out tonight and stripped it down,going to take it and have it cut down this week,with just the bare housing from flange to flange it measures like 54 1/8 basically 54in,so with that said if i have it cut to 50in total width flange to flange i should be fine right?Sorry to keep going on about this but just want to be sure.THANKS!