Exhaust and intake bolt center' spec request:

powerband

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Exhaust and intake bolt center spec request please:

RE: later heads and exhaust manifolds - @ C9de thru @ D7de.

I'm fabbn' up some exhaiust and intake flange adaptors for an engine build and need exact spec measurement for FLANGE BOLT CENTERS for the Intake Port on the intake runner/log (NOT the carb mount studs) and the Exhaust Outlet.

> 3-5/16 INT (port) and 3" EXH ? , with a yardstick ...

thanx
 
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