In the mid 70s I had the opportunity to get a Weslake 500cc grass track motor. The plan was to convert it to dry sump instead of total loss, and drop the comp ratio so it would run on petrol. Then install it in a rolling slimline Domi, that had been burn't out....damn fibreglass tanks. Sadly after doing a lot of the preliminary work (finding out if it was feasible, getting information from weslakes etc), the motor went in another direction, not to me. It would certainly have been a goer though.
It was at about the same time that my brother and I were working on a Hillman 1200cc Rally Imp engine in a roadgoing, featherbed framed, single seat sidecar, we had sourced the leading link forks, and 16" wheels. All this so Chris (my brother) could take his beagle away camping with him!!
cheers
wakeup