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)
The ones I took off were square, not a big issue. The short mount (granted it is compressed) measured right at .5 in. the taller mount again a square puck measured .82. When I look online some sites list the mount kit as C10 only. LMC truck list the same kit as both C and K. When I ask AI, it says C and K mounts are different in height. When I look at kit pictures, they look taller for both front and back mounts. From just the eye test it looks like the C front mount might be the right height for the rear k mount. I guess if the front to rear ratio is the same I could shim the bed to get the correct alignment.
Looks like mount height increased in 63 when they went to the round mounts. I went back and checked the 60-62 mounts were shorter but C and K used the same mount. I guess shimming the bed to get cab bed alignment is the answer.
Sounds like you found what you need. Maybe come back and update on the new mounts installation when you get them installed. There will surely be others that may be interested on hearing your results.
~ 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)
