I'f I'm not mistaken almost all the parts can be moved from one car to the other. However, like Scott said, they won't necesarily be the correct parts for the year of the car. On the interior, there were some pretty significant changes to the dash and center console. The seats ought to interchange but I believe there's some differences there too. You ought to be able to swap engines and transmissions, but there's differences in the head, and intake manifolds for emissions. I believe the carbs are also different, if I'm not mistaken. Your '67 should have HS4s, while the '74 has HIS4s; though I'm not 100% certain on this one. I *think* there's a difference in axles too; one has a "Salisbury" axle and the other a "Banjo" axle, but I don't know which should have which.
HTH (Hope this helps), and someone ought to be along to correct me where I might have mislead. /ubbthreads/images/graemlins/smile.gif