They are listed for 60-66 in LMC, but they do do not work with the 60-62 vent covers. Ask me how i know. I have a set of 63-66 vents on the way to me to make them work.
Just as a point of clarification--the '60-'61 vents are cable operated, but the '62 is the sliding handle.
I swapped a set of '60/'61 vents into my '62 Suburban, and it wasn't a direct fit. Had to notch the opening in the kick panel to clear the operation cable, and drill new screw holes to mount the vents.
-Brad
