For my "in the post" Marin Team Titanium. Ideally ahead but threaded is fine. Head tube is 120mm. Going to build it up as a winter worker at first so don't mind if they aren't top of the range! Thanks....
Its a 1990/91 Litespeed one - so I think its an inch. It hasdn't actually arrived yet. Just bought it (slightly rashly) from ebay. Thanks for the offer on the fork - I'll have a quick measure of a similar frame I have at home tonight and let you know.