Both tony and joek3167 info is correct. As stated 710 is listed as a 1960 color with 727 as the 1961 color but your theory of early 61(actually built in 1960) may well be correct. Sounds like a cool project anyway. These old K10s are few and far between and very neat. You might check and see if the build sheet is in the seat or the protecto plate is in the glovebox and see what they say for the color code. If you have any questions fill free to email me at the address below. I have a large collection of factory sales brochures, service manuals and other info for these trucks. Good luck with your new project,


65 K10 Longbox Fleetside Big Back Window Custom Cab
65 K10 Flatbed
Old School Parts 60-66
(208)946-6173
[email protected]