1967 273 Intake Question

I know this is a real old post but...

@cuda dad photo in post #1 is a 2536771 4BBL intake

@Cuda Al post #8 and @pishta post 22 photos show 2BBL intakes

My post #12 shows both my OE 2BBL intake 2536559 mounted on the engine and the loose 2536771 4BBL

My 2536771 4BBL intake has the boss the OP was asking about but it is not drilled, nor does it have any where to go to.

According to NRA site I saw, the 2536771 4BBL is a CAP manifold for 67 model year.