Here's a beautiful treatment of a 71 A65L in New Zealand
I Came across these beautiful photos on flicker by a vintage bike enthusiast in New Zealand. This is a lightning rather than a Thunderbolt (main difference is it's two carbs vs. the A65T's one). The tank appears to be a from a triumph T140/Tr7, based on the location of the petcocks (BSA made a tank this size for the a65, but the petcocks were located further back otherwise the tanks are identical). Anyway, kudos to this fine gents beautiful work.