If your truck still has the stock 1962 rearend , to my knowledge the only gear set available is a 3:38 I beleve in the aftermarket ... The rear mounting is also different on the Chevy 1960-1962 Rearends versus the 1963-1966 rearends . X-Frame versus conventional frame .. Otherwise as 1963c-10 stated , Gears are readily available for the chevy truck 12 bolt 8.875 rear ends .. Good Luck !!!
My 2 cents ...
