The guy on Ebay with the 24" 1988 Schwinn Circuit frame and fork dropped his opening bid last night, so I set up a snipe and got it. Paid too much, IMO, but I can't think of any other way to get the correct fork with a long enough steerer for the 23" frame. The 23" has a complete Sante BB in good condition, which is nice. I washed it this morning and the next step was to polish the paint with Scratch-X. The frame came from Colorado, so although there are a LOT of chips in the paint I see no rust. I touched it up with the paint I used on the 22" Circuit.
Here's a pic of the frame as it is now...
The decals are looking slightly scabrous, especially the "SCHWINN" on the drive side of the seat tube. I MAY try to touch those up. Not decided yet. VeloCals does not have these, unfortunately.