While trying to clean and restore my 1977 Schwinn Varsity https://public.fotki.com/patsmods17/schwinn-varsity/ I went to take the front brake off and the main bolt that runs through it snapped in half and now I don't have the origional front brake to match the rear one. Just my luck. Now I don't know what to do!

I'm thinking you could probably find a suitable substitute bolt at the local hardware store.

Alternatively, turn to eBay for salvage

https://cgi.ebay.com/Vintage-1974-Sch...2em118Q2el1247
https://cgi.ebay.com/SCHWINN-VARSITY-...2em118Q2el1247
https://cgi.ebay.com/SCHWINN-VARSITY-...2em118Q2el1247