Title Question! Please Help!!

[back.woods_4life]

hello guys, ive recently found this forum via google. i was searching for answers to a title question i have about a truck i just bought.. google brought me to a thread on this website. but now that i created an account, i cant find that discussion!!!

here is my question. i just bought a straight and clean 67 C20. long bed 3/4 ton. really nice running and driving truck. the advertisement called it a 1967. and the body style matches the year... i had this thing delivered from Oklahoma to my place here in Arkansas. after he dropped the truck off and left, i got a closer look at the title...

the date on the Oklahoma title is "1966", (it was tagged and insured when i bought it, so its a fairly new title) BUT the VIN numbers on the truck and title match. and using the VIN decoders ive found online, the VIN number returns to a 1967 3/4 ton long bed V8.. which is what ive got..

im not sure why the title would say 1966, it does claim the truck to be built at the end of the year in 1966, but shouldn't the actual year model be listed on the title???? or is that just the way they do things in Oklahoma?? would this be some kind of half year model? any help guys???