mid-80's Miyata 912 that I'm completely overhauling. The lower head tube race clearly has to go and I'm planning of having my LBS do the R&R. Is it generally best to replace all the races and is it difficult to find parts that will fit my fork and head tube? Haven't measure the OD yet, but it's likely I'll just ask my LBS to order whatever I need if he doesn't have it in stock. Even though I have a new Giant OCR1 I'm really looking forward to having the old girl rolling again: good steel frame, triple chainring, 700c wheels, all Shimano 600.