440 Exhaust manifold gasket

[Charger976]

Hello,

I have to change my exhaust manifold gasket on the 440-4bb of my '71 R/T Charger (RH exhaust leak).
Does anyone know the port dimensions for a stock 440 HP (1971)?
On the net I find many sizes.
I think the correct dimension is 1.38x1.88 but I also find 1.48x1.78, 1.33x1.84, 1.47x1.98 and others...

 

[3white74]

I would order remflex from summit racing ....no more leaks after that ..... factory did not put exhaust manifold gasket on !!!

 

[topside]

Most likely the manifold is warped, but may be cracked.
Having it surfaced will seal it to the head.
As stated above, factory didn't use gaskets at exhaust manifold to cylinder head.