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Thanks for the information.
When you say "port" are you referring to when they grind out the lower edge of the valve guide in the intake/exhaust opening, or if this where they open up the passageways in the manifold? Or something else entirely...?
My previous experience with a machine shop is solely in having my 140's manifold ground down to remove a big nick in the manifold. I've read a bit on Phil Singher's site, but that's it.
Also, I'm talking about the oil seals that come with the B18 gasket kit. They look just like the B20 seals.
Gonna start my list of parts and services needed now...
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