Originally Posted by br995
edit: for the record, the thought of drilling the fork upsets me, too. Plus, isn't there a chance that, because it's not designed for a brake, that the area you're drilling won't be strong enough?
No, there is no chance of that - unless you're using those crazy-ass, old school 22mm round fork blades, you build a track fork out of the exact same materials you build a road fork out of. The main problem will be if there's too little clearance; that might've been a bigger problem a few decades ago, but these days extremely short reach brake calipers are a dime a dozen.
As proof of concept, here is the same crown with a brake hole in it:
I did that yesterday, and God has yet to smite me down. So I figure it's going to be OK...