if you are going to weaken them a full club worth then be careful about bounce. 4 degrees of bend is a lot too.
May be better off leaving heads as they are, but modifying shaft lengths back to old specs if you are looking to go more retro. The number on the sole will be the only difference.
Thanks for the heads-up! I figured going all the way back would be too much for the hosels anyway. I don't have a whole lot of bounce to begin with, but thanks for clueing me in on what should have been obvious,but wasn't!