560 South 11th Street, Kansas City, KS 66105 Tel: 913-207-7789
http://4-5-6chevytrucks.com/new-parts.html
This kit includes the factory-correct 2nd & 3rd row seat mouting plates for the '60-'66 Chevy/GMC Suburbans. This kit includes 12 mounting plates and factory-correct mounting hardware, as would have been installed for 2nd & 3rd row seat configurations in the Suburban Carryalls.
Seems the description omits the existance of tracks found in the 63-66 GMC's.