Contemporary Classic is 8 7/8" from the opening to the bottom of the emblem.
CSX3318 looks lower
CSX3020:
CSX3018 from the day:
CSX3112:
CSX2375
COX6111
CSX2345 COMMANDO
Sharp eye for details! I just looked through a few books, SAI looks to have placed them on the lower half of the front end. COB, COX, and Autokraft (with exceptions) look to be centered. Oddly enough there are a few restored 3000 cars that look to have a centered emblem. As with all these cars there are always exceptions.........