briv71

NTX5467, I really appreciate your concise reply regarding my situation. You have broadened my knowledge base and given me some new angles with which I can confront this issue. I'll let you know what happens. Thank you very much! briv71

The heads on my '71 Rivera have been milled and consequently when a stock intake manifold gasket is used, it results in a vacuum leak and the car runs poorly. I have no idea how much has been milled off the heads, (it was done to smooth the heads because of a blown head gasket). Is there an intake manifold gasket available to compensate for this or do I have to have the manifold machined to mate up properly? How do I determine how much to machine off the manifold?