Is it a '67 K-frame? If original is not important you may want to, at the very least, go to a '68-'72 K. If you decide to go that route you can pick up a K, do all the work and have it ready for the swap. The main difference is the idler arm mount, '67s are notorious for having issues. It is single shear ('67) vs. double shear ('68-up).