Laaaaance

I have a 1980s Schwinn Sprint that I have converted into a single speed. I ride newer road bikes but never have I talked a conversion. So far everything has been super easy but i can't seem to find a front brake that works for the 27 inch tires with reach. Newer brakes don't reach and I really don't want a center pull brake (although I will be doing some local cross races with it and some suggested I should get center pull). I chunked the old brakes because they didn't work. What kind of brake should I get? I wouldn't mind a side pull but if I get one what size? I can't seem to find what brakes specifically goes on older road bikes. Any help would be great. Thanks!