Attached is a copy from the 1967 Interior Assembly Manual. Pick out and write down the Part Number of the screws you need.
Then go to Jim's 1967-68 Hardware Listing in the Library. There are two listings ; one by application, and the other by Hardware Part Number. Pick the one by Hardware Part Number, and fine the matching numbers to what you wrote down. Jim's listing will give you the type of head, size, length, finish and quantity.
Hope this helps.
Bob