The 62 frame along with its' torsion bar IFS is rare. Those "X" frames were only used from 60 - 62. That's why you don't see chassis parts/upgrades for trucks of those years in the vendor catalogs. Do a search for torsion bar suspension parts for those years and you will see. The mustang II seems cheap to me compared to what you would have to do to make that frame work w/ the tranny and motor you want to use.
Good Luck!
