[FC] Front suspension differences

[Vairtec Corporation]

Andrew, there is no meaningful difference in FC front suspensions 
throughout the entire production run. with the sole exception of how 
the main suspension crossmember interfaces with the gearshift.

If your truck is an automatic, everything will swap with no problem.

If your truck has a manual transmission, the 1961 through midyear 
1963 gearshift linkage mounts to a bracket on the main suspension 
crossmember.  For midyear 1963 and up, the manual transmission no 
longer mounted to the crossmember.

That "notch" you noticed in the top of the 1964 main crossmember (an 
indentation, really) is to allow better clearance for the 
through-the-tank 2nd design manual transmission gearshift.

--Bob Marlow