Transmission crossmember clarification

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Joined
Oct 27, 2022
Messages
194
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Location
NW Oregon
My Car
71 Mach1 351C-4V C6
In rebuild mode
Hey guys, this has probably been gone over before, but I need to know if a 71-73 FMX crossmember will work with a C6? I've read in some places that it will work, and other places it says that there is 1/2 inch difference in height. What's the deal?
 
The C6 and the FMX share the same three legged crossmember - D1ZZ-6A023-A. There are different mounts listed in the MPC for fixed roof vs convertible cars, but the crossmembers never change.

Also, the 71 listing in the MPC shows the -B four leg crossmember for the FMX, which is an error. It was correct for '72, 73 and in the Mercury MPC.

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