IMO, probably not. The changes needed, probably to accommodate the B/RB engines, widened the tread width by 0.8". This affects the attachment points of the lower control arms to the K-frame. Even if the newer part were a bolt-in fit, it would create more negative camber on the front tires than the alignment bolts can compensate.
What forms this opinion, one may ask? Upper control arms were different from 1963-66, 66-72 and 73-76. The lower control arms interchange across all years. Front tread width changed from 55.9" to 57.5" between 1966 & 1967. At the same time, overall width of the car changed from 70.8" to 71.6".