What is difference between Custom and CST?

[toms68cst]

Whenever I see a 68 CST, I look for the pedal chrom trim.

I kind of loosly consider the 68 chrome pedal trim on 68 CST's the acid test for factory CST's. It's pretty much the only thing that a true CST has that is not available as a seperate option. Of couse they could be fitted after the fact by someone. The 68 cst bench seat is also unique to 68 CST's.

I agree that the 68 cst's lacked the special horn button that the 67's had.