60-62 4x4 VIN number question

[60to66]

Can anyone tell me if 60, 61 & 62 4x4 trucks used a K in the serial number? I am talking primarily about Canadian sold trucks. I know that in 63 to 66 you would typically see a number like 3 to designate the year (in this case 63) followed by a K to denote that it was a 4x4. I have looked at several 61 4x4's lately that guy's swear are factory 4wd's but they have C as the second digit. If you look at the S/N decoders for CDN model trucks online you don't see K's in the model numbers either. Looks to have started in 63. Anyone shed some light on this for me? Thanks