Moog Pitman part numbers

I'm working on a 1965 Barracuda.

Moog K7020 says: 64-66 Pitman Arm (A bodies)
Moog K7074 says: 65-72 Pitman Arm (A bodies)

I have a K7074, and it looks slightly different than the one I just took off. So I guess I have the 7020. Why the incorrect overlap?

Anyone want to trade a 7074 for the 7020 I need????

Mike