Ted, I was doing some cleaning up and I found a set of the TF hinges, now I am sure that they are not the same as the early hinges. These are taller than the early hinges and the bolt holes may not line up either.
Next time you are trying to remove bolts and the piece is small enough to fit in a tank, you should try the electrolysis process to free them. In your case if you had ground off the head for removal and then tanked them, the next day you could easily remove the bolt. My brother has been doing this for years and now I am hooked!
