Got a little Thunderbolt about 9 months ago...already had an older restoration done on it...have got bills from PO for around 18 grand!!!
Engine has lots of SRM bits in and on it.
It was apparently ordered for the Aussie police, but that came to nowt as BSA were boogered...It was eventually registered in 1973 at Queens Park Motors in Salford. Got a little Starfire in trials trim with a b40 lump in it too....
Pete