Just as a point of clarification, I am sure Bob & Jeff must know the Original Poster and that the car he is working on is a 67 GT500, but I have not seen it mentioned in any of the OP's comments within this thread. User name is the closest clue I have seen besides a few of the comments that would distinguish that detail for say, somebody else looking at this thread working on a 67 S-code with Thermactor.
Richard