Exhaust Gaskets

[ODZKing]

Anyone ever had an issue with burning up exhaust gaskets? They were bad when I bought the car, went after I put the engine in, went again after I put the mufflers and extensions on and now they are gone again.  Actually drivers side.
Tom at Accurate suggested taking a good look at the flange and being positive it is absolutely flat. But also mentioned the manifold is getting too hot. I know the timing is not perfect yet but would that make the manifolds get too hot?
OEM HP manifolds for 400, I checked the numbers with Tom. 2 1/4 inch head pipes to Dynomax Super Turbo, then to tail.
If anyone has had this issue, what did you do to resolve it?  

[cudaken]

With the age, I would have the exhaust manifold checked to make sure it is straight. I am guess a machine shop should be able to plane it.  I think there are some gaskets with cooper O rings but not going to swear to it. Never been a problem for myself.

Cuda Ken

[Brass]

Where exactly is it leaking?  I had a recurring exhaust leak at the flange and kept going through collector donuts until I had the flange replaced.

[ODZKing]

Yes, flange. That is what Tom referred to. Warped or an uneven edge. Sounds like that is the next little "issue" to deal with. As I've said before, its always something.