Dear Frameteam, do you think that the Schwinns, either of them, are about the same frame size, say 64 or 65cm?

Also, what about the threads and what not that you experts talk alot about here. Are they highly interchangeable? That is what I am looking for ... at least as much as I know.

I am off to eBay and Craigslist and the Post Dispatch to find my frames.

Thanks, Richard