so i was at my old high skool in the mroning to drop by and sand blast my manifold and valve cover and a header

sand blasters are tight:D

Very nice.

What year is that manifold? It looks different. There is something strange to me about the cross-over pipe.

the balance tube is different and it looks like, in the second picture that it is one piece. Cast in with the front intake. What is the large opening in the top of it for ?

its from a 73 and the both first pics were of the rear and front manifold and the hole on the top is where the egr went which i need to block off

Opening in the top looks as if it might be for EGR. So I suspect the balance tube is from a 260Z. I was going to say a '73 240Z, but since beandip didn't recognize it...

Edit - Didn't type fast enough...