With AN hardware in hand from Lane Aviation and a couple of brass fittings from the Gahanna Hardware store, I'm ready to get back onto the parking brake modification. -Transfered the rivet holes from the stock brake line bracket to the new bracket -Drilled the hole #30 and countersunk -Located the holes for the valve to install on the newly fabricated bracket. -Drilled the holes with gradually larger bit starting with #30 and going up to 19/32. -Test fit and had to move up the hole diameters on fractional bit size to keep alignment - I didn't get the holes perfect. -Cleaned and primed. This took much longer than it should have, but I think this design is going to work great.
Here I am roughly laying out the valve location and the routing of the brake lines