Keep in mind these heads did not have hardened exhaust seats, so not the best for no-lead gas. Folks use them and they will work, but if you are going to put a bunch of miles on them the seats will erode. If it isn't a "numbers matching" thing which it sounds like it isn't, you may be best served to eBay them as they do have pretty good value to those restoring. Probably could take the dough and just about get a set of fully prepped aftermarket aluminum heads. Something to consider.