Well that's the breakdown of the casting number but each intake has a paticular casing number. My books are 1000 miles away or I'd be able to better help you out. I'll be home this weekend so I can check for you then if no one else can help you out. But by the date code breakdown for certain it's a 68 intake. The heads and block have numbers also. On the big blocks the head numbers are between the center 2 spark plugs. I'm not sure where they are on the small block heads tho but maybe see if they are there?? After 38 years it posssible some parts have been swapped but maybe not. Sorry i could not be more helpful......


G.