I haven't noticed anything about this distributor on the site and was wondering if anyone has tried one.
A-Team Performance Pro Series Ready to Run Distributor Male Black Cap Compatible with 1955-1957 Ford Thunderbird Y-Block Tach Drive 272 292 312 (swperformanceparts.com)

I'm currently using a Mallory Unilite on my 55 'Bird (B manifold and newer Holley) and was wondering if having a vacuum advance would be a big enough advantage to justify the change.  The price seems a little too reasonable, but it is an interesting idea.

Don