Assuming you've had the Bronco and the brake lights worked before, and you have a 2-post pressure switch (
http://www.wildhorses4x4.com/product/brake_light_switch_66yr) you should be able to simply extend the Centech wires near the pedal out to the engine compartment. For only two wires, you probably wouldn't even need to go to the trouble of cutting the tape and inserting them into the loom to keep things clean.
Either just run them as-is, or tape over them if you want.
If it was me, I wouldn't even cut the ends off. I'd just create two new wires with the correct ends to mate up to the Centech harness ends (flat spade connectors if I remember?), insulate them and run the new ones out to the switch. This way if you ever change to a dual master cylinder and have to use an under-dash switch, you're virtually ready to go.
Trei's method is probably more kosher, as it eliminates one pesky connection. And if you're never going to change the master or brake switch, it's the cleanest way too.
All the replacement harnesses are patterned on the '71 and later models, so in your case, you're forced to modify it. But it should be relatively simple. And it doesn't matter which wire goes to which post since it's just an open-close switch.
Paul
