Drew. The source I have shows the WA-1 990S as fitting the 52-54 Hudson Wasp/Super Wasp twin carb motors.(2-11/16" centers).
I can't find a #968S listing in any WA-1 for any car. I know a source for a new matched pair of the 990's. Sold only as a set. $$$$$$$.
The Stromberg BXUV-35 is a replacement carb for one model WA-1 but has 2-5/16" centers.
These WA-1's were on many 40-50's makes except Ford and Caddy. Everybody else seems to have used them with slightly different #'s. Probably stick vs auto, manual vs auto choke and linkage differences. Don
