Can some one tell me the width of a 67 Mustange rear end from backing plate to backing plate?

Well, I got 59 1/4 inches from flange to flange. I figure about 54-55 inches between the backing plates.

The range is given because the backing plate has some ridges and grooves on it, it depends on where you measure.

Thanks sounds like it might work for what I want to do. I want to use it in place of the stock rear on a 63 Chev Nova.Between backing plates it measures 53 inches. This would give just a little wider stance on the backand I have more room to the outsideof the fender wells then to the inside . This would be good for wider tires. Thanks again

The Chevy II (Nova ) has leaf springs in the back, yes?
Do the spring perch locations match on the Chevy and Ford rears?

It's possible to cut and relocate the perches but its a challenge to get the pinion shaft angle right. It may be easier to find a rear which has a match.