thermastat housing leak!!

[rodstored-72]

well i must turn to you professionals again. i have a edelbrock air gap manifold on my 383(350) & i bought i chrome neck from my local autozone. i can't seem to get it to not leak!!! it is really frustrating anyways i have cleaned it off & tried to put it back on again & i still have a leak!!!
i want to keep it chrome so my engine will look nice. can you guys please tell me what you have done & or tell me some ideas to try to keep it from leaking i have put gasket maker on both sides of the "rubber" gasket & same result.

any help would be much appreciated.


thanks!!!
rodstored-72