vin numbers

i have have a 69 short box stepside 4x4 and i am trying to research if it is original and were wondering if anyone knows any websites to put the vin numbers in and see if it is originally a 4x4 and or stepside because i havent seen any other 4x4 stepsides of this year
thank you

Can't say as I know if it's original or not, but I think Scott's Super Trucks might. www.scottssupertrucks.com
They deal specifically with Chev and GMC trucks & parts 1932-1972; I've used them before as parts suppliers, and they sound like they know what they're talking about!
They're based out of Alberta, Canada.