The bolt holes are the same in the heads,but the ports are designed differently--they won't match up real well with the stealth intake. The efi ports are round whereas the carb heads are wore oval shaped.

  I have seen people use the stock lower intake and modify a regular one inch spacer to use a carb on top of it. The stock lower intake is basically a low-rise dual plane. I think you need a quadrajet style adapter if my memory is correct.

It's only a couple of plug in connectors and 4 bolts that hold the upper intake on--take it off a see what you think. The gasket is only a couple bucks.