Whats wrong ?????

It looks like it was cut to me. The intake face looks pretty thin. Most likely the heads were milled on your 360, and instead of also milling the intake side of the head, they cut the intake to fit. Now you're trying to install it on a set of heads that are not milled, and it doesn't reach. I've seen it several times. I've got a Performer RPM, a couple Holley W2 intakes, and an Indy oval port intake that are all like that.

I guess that the 360 block could have been decked and caused the same problem.