I don't know my way around the net. I have a 1957 GMC long box frame that I would like to cut down to a short box and install a MII front, would anyone know of a site that would have the frame specs? oblong101
You need to remove 9.25 inches. Check this link, http://67-72chevytrucks.com/vboard/showthread.php?t=323615 Frank
I don't know if it makes any difference to the Mustang II front end, but the front crossmember is different and so is its position between the Chevy and GMC frames.