Here is the valve from my late December-built 1972 Trans Am 455HO, 4-speed with power disc brakes and 15" wheels: (sorry, I dont have the reverse side photo)
Here is the valve from my late December-built, 1972 Formula 455HO, 4-speed with power disc brakes and the Trans Am supension option and 15" wheels:
As you can see they used different design valves even though it was the same application and built during the same week on the same assembly line (Norwood). So either one of the two you have would be OK for your application.
Hope this helps.
(And I'd be happy to take over the rest of your resto if you wanna trade) :-)