68 barracuda 383 id numbers

hey guys i am in need of info on 68 383 block numbers. i understand that the ser numbers are stamped in the block where the engine meets the block on the top right side. But for the date of the block should it be stamped on the pad next to the dis? Also is there a chance it could be a 1967 block? i am aware of the date casting in the block on the right side under the ex manifold. i was wondering if there was an other place? sometimes that area is caked with 40 years of oil and dirt. thanks