Here's a partial pic of my 66 A65T Thunderbolt in Blue. As seen in pretty darn good company at Gordon's Beach Run back in March of this year (2022).
This bvike was nearby and I'd been keeping an eye out for a BSA when this came up on F B market place... really crappy phone pix at first but when he posted better pix, I was on it. Mostly original, only thing done to it was (I THINK) some rewiring and maybe also a Boyer added.

[Linked Image from ricochetridersmotomojo.zenfolio.com]