I have this 1955 Triumph Speed Twin / 5T / T100 pre unit frame project.
It has a much earlier engine for a 1946 Speed Twin. The engine is a bit crusty but recoverable. Anyway, It’s coming out of the frame as, rather conveniently, I happen to have a good 1955 Speed Twin engine.
So, if anyone is after a post war Triumph 500 Twin engine for their project, let me know. Numbers begin with “46-5T-78***”