I think I have about three sets of power steering linkage which came from Mavericks...all still have the valve assembly in tact. Exactly what part are you needing as this stuff is pretty heavy and would probably be pretty expensive to ship the entire setup. The assemblies I have are from tie rod to tie rod. The only problem I have is I couldn't tell you how good they are as they came off of non-running parts cars that I bought. However, if you are needing just the valve assembly, I have a new one still in the box. It was bought for a 72. I don't think I'm going to be using it and I think it should be the same as for the 74 although I'm not 100% positive. Let me know if any of this interests you.
Ray