The 1975 MPC calls for:
Wheel - solid color - C7ZZ-3600-L (suffix = color; L,J,P,K,H,M,N)
Wheel - woodgrain - C7OZ-3600-AJ (see tech service bulletin #94, article #1429)
Cap - solid color - C7ZZ-3623-B (suffix = color; B,C,D,E,F,A,G)
Cap - woodgrain - C7ZZ-3623-H (suffix = color - but black is H as opposed to solid color cap of A, and others have asterisks)
On page 4656 and 4657, there are diagrams of the steering wheels and components. Here are the pertinent notations:
1. Picture P-5746 Standard steering wheel - there are three components noted
a. 3629 with an "*"
b. 13A811 also with an "*"
c. 13318 with a "dot"
2. Picture P-5747 woodgrain steering wheel - there are three components noted
a. 3629 with an "*"
b. 13A848 also with an "*"
c. 13318 with a "dot"
The "dot" note is for "Mustang with tilt wheel only". The asterisk "*" does not have a clarifying notation.
A few pictures up and the asterisk "*" notation is "supplied only in 13A805 horn button assembly", but there is risk in assuming that applies to the drawings as part of this discussion.
I think it is safe to say that the tilt wheel unique part is 13318. The first part installed on the steering column shaft is the spring 3520. 13318 is the second part, and is white plastic, not seen under the chrome components.
Part 13318 has a name of "Cam (turn indicator turn off)"
For the tilt column, the 75 MPC calls for C7SZ-13318-B and applies to full size Fords, Mustangs, and Thunderbirds.
Looking at the lower collar, part 3491 is "cover (steering wheel hub lower)"
Part C7OZ-3491-A applies to Fairlane and Mustang with woodgrain wheel. No alternative for tilt wheel.
Need to check the 67 MPC which would hopefully shed more light on this.
I'm attaching a picture of the cams, not sure which is which yet, and one might have some tabs broken off.
Edit - the cam on the left is for the tilt wheel application, and is indeed damaged. West Coast Classic Cougar has them.