In our CSX, I used a Mustang shifter with the wood T-handle from a '68-'70 Shelby. It has the chrome Shelby Cobra emblem on it. I used the shift indicater bezel from a '67-'68 Mustang so I would have the desired in line, progressive, pattern trimmed in chrome. 12DNRP The earlier '65-'66 bezel has 1D2NRP. I always change the valve body in an early Mustang to the newer style, to facilitate progressive gear, speed shifting too.
ST
I noticed in the picture of CSX2589 that you posted that it has what appears to be a '69-'70 shifter and bezel. But then, I could be wrong.
Fast Farmer