Don't worry about the data given for the '70s Grand Prix variant. Those were made in Nottingham, and bear no relation with the 1986 Taiwanese-produced GP's.

I don't recall what the steerer tube stack height is for this machine, nor the crown race seat. I'd measure the crown race first, then look through options in that size.

Near as I can see from this photo, my '86 seems to have had quite a short stack height - similar to the 1" threaded Shimano 105 and 600 headsets. Either of those, with the correct crown race, should fit. I question whether the Tange Levin (EDIT: See later posts for discussion on Levin variants) - which has a similar stack height to the rather tall and portly Campagnolo Nuovo Record - would fit.



You know what? I regret getting rid of this thing. The ride was better than the '84s, and it just looked darn good. Some of my happiest miles were logged on it; then I switched to the '61 Paramount. About that time, I learned about the A&S forum here...well, I'll say no more.

-Kurt