An interesting special I saw 40 years ago, was at Brindleys in Bawtry, an AJS 7R with a chopped twin in it, a fabulous looking thing !!!
I wonder if anyone has pictures of it ? knows what happened to it ?
Around the same time from the Leeds area was a Norvin, chopped engine, BSA Gold Star box, 7R front wheel, Manx back, Gardners, twin open pipes and not much else, yellow tank, seat and top half fairing black, saw it at Cadwell, Squires café and I.O.M. in 1977, always wondered what happened to it and mentioned it to a friend last year, he photographed it at Cadwell probably the same day I saw it !!, then a couple of month ago at Squires a guy was looking at my twin and we got to talking, well he was the guy who had the Norvin !! he'd sold it to someone in London and then it had gone to the west coast of America but he's been unable to track it down, here's a picture of it leant against the gents toilet wall at Cadwell
There was another Norvin near me later with a twin disc Japanese front end, Triumph 16"rear wheel a tank from a 2 stroke Kawasaki widened and I think a Honda tailpiece, this was later broken up and the engine put back in a Vincent.