20 years ago back when AC Porsches were still common was active in San Diego PCA.
PCA taught me AX, DE, TT and W2W/Club racing and car control skills.

Became a PCA instructor and was an announcer at the San Diego PCA Parade AX.
Today PCA DE/TT is mostly filled with Caymans.

10 years ago I left PCA and now vintage V8s race mostly with VARA.
https://www.vararacing.com/