Besides the desire to put a threadless stem on it, in reading through the thread I see that you've used the description "a sherman tank of a frame," and used the term "iron tank" in an analogy.

The 1986 Schwinn Peloton is a nice bike, built with nice frame tubing.

If there were such a thing as a Schwinn Nazi, he would say to you:

"No Schwinn for you!!!.....Next!!!"

Get a clue.