E-brake, P-brake. I have a P-brake. If I get in a bind w/ a hydraulic system failure while moving, I'll be hitting the lower gears, and turning off the key and hoping for the best. And w/ no inspection of Street Rods in MD (a BIG loop hole if you ask me), I can get by w/ this arrangement. PS: I still have the handle, brackets and cables that could be connected to the e-brake actuator on my rear disks. All the hardware is available if I have to go that way. And if I could hide the handle under the dash, I'd do that, but I understand that the traditional umbrella handle installation deal is a nightmare: cutting body parts, fabing and welding custom brackets, and God only knows exactly what.
And Lane, the line-lock gizzy in the cabin is quite small, on the order of what your headlight push-pull switch on your dash looks like, so it does not need an arm rest to cover it. Mine hides behind the seat, attached to the floor. I'll show it to you at Carlisle, and you can see. You can even ask John Steele about how to put one in, although I think it is pretty straight fwd, if you are OK w/ cutting the rear brake line and dicking around w/ small flared fittings -- and if you can deal with John . . .