Thanks for all the info pat. I should be able to rebuild the original prop valve fairly easily. I'm gonna work on it tomorrow. The thing that might be a pain is flaring the brake line that goes to the passenger front caliper while the line is still routed all the way to that caliper. When I was taking that line off the prop valve, I had to break it off because the nut was too far seized. I traced the line and it's routed pretty nicely but it would be tough to get that line out and re-route a new one. I only took off like an inch from that brake line so I'm hoping I can flare it while it's still routed and connect it back to the prop valve after it gets rebuilt.