Angle of intake port surface?

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DrCharles

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Regarding possible milling of my intake manifold flanges:
Does anyone know what the angle of the intake surfaces on a B engine is? I assume the intake manifold and the head have the same angle so they meet flush. (It appears that mine do not at the moment). Is it symmetric (left and right)? If so, I just need the included angle.

Somewhere I saw a drawing with all the angles and dimensions but can't find it again.
Would an automotive machine shop be expected to have this information?
thanks.
 
Thank you :)
As it turned out, that wasn't my problem. The intake ports were indeed leaking at the bottom on both sides, but that's because the tips of my Performer RPM were hanging up slightly on the end rails. A couple of minutes with a burr and die grinder and all is sealed ;)
 
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