jim haseltine
Senior Retro Guru
If it was built for 26" then on 27" the handling will be a bit 'unusual' (so to speak). When I wrecked my work bike back in the 70s (a Claud by coincidence) I put all the parts onto my father's old 1950's Raleigh and built a new 27" front wheel for it. It's wasn't a pleasant bike to ride any real distance.