Casting date location on 69 435 vette intake manifold?

[Jimlt4383]

Where is the casting date located on a 69 vette 435 intake manifold? Is it under the bottom shield? Appreciate and help. The carburetors have a 69 date.

[Big Block Bill]

I believe it is located under the metal shield on the underside, pry up the push in rivets with a V shaped panel remover and a hammer to see it. You will not believe the caked on Crud underneath the shield and manifold. Good luck. Bill