[WIDESIDE72]

If you are going to stick with eight lug chassis, the whole front crossmember out of a 73+ truck is a direct swap. The lugs studs are larger though so you will have a mismatch front to rear, but technically a straightforward swap. I kept the front crossmember out of an 82 c20 in case i decide to pit disc brakes on a 70 longhorn i have. It has leaf springs in back and i have a 72 c20 rear axle from a leaf spring truck with the larger studs. Not sure when the swap to larger lug studs was made though.