Gary - A peek into a reproduction 1960-66 FAM shows the mount cushions/shims/spacers to be the same for both C10 and K10 model (see 1st pic below). A check of Chevy Master Parts Books shows the 1979 Book listing the cushions as the same for 1960-63 Series 10-30 including the 4WD (see 2nd pic below).
Granted this is book knowledge and not specifically confirmed with actual trucks. How did you determine that the mount heights are not the same?
~ Dan 1951 Chevy 3 window 3100 Follow this story in the DITY Gallery "My Grandpa Carl's Truck and How it Became Mine" 1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
