Alternatives to Long Drop Calipers Anyone have a clue what type of brake I can fit to this front fork? 

The reach to a 700C wheel would need to be 80MM (do you even get calipers this long?) and the only brazing on the fork is this weird looking bottle opener thing so no option for canti's etc........stumped!!
A BMX caliper such as an Odyssey 1999, Dia-Compe Bulldog, ACS Boa, or any number of others would work. Published reach for the 1999 is 74-95mm and and 86mm for the Bulldog. Some of these brakes are pretty respectable in terms of power/performance, and a lot are garbage. Watch out for weird oversize pivot bolts on some of them.



Other solutions where the reach should be good but that probably won't work very well with a narrow road rim: Odyssey Pitbull and Pitbull 2 roller-cam brakes, or a 990/u-brake adapter and a standard modern BMX u-brake.

Edit: Some of the longest and fanciest of the fancy rando long-reach centerpulls may also work, barely. Compass lists their brake as 65-80mm. However, if it did reach, it would probably be the best brake you could get on there.