Build thread- 73 duster, forged 5.7 w/ PS and AC, 5 spd, big brakes and floater rear

My rear is 60.5" wide. A body factory is 57 1/8.

I was talking flange to flange sorry. Mine is either 58-60 also. I will have to measure. I think mine is only 1in wider each side. I want to say mine is a 63 for some reason