Started to gasket match (port) my fe ford heads and cut into water jacket well before I got down to the lower mark I scribed.
It's about half the size of a pencil on an intake runner. Any way known to fix? This kind of head is getting scarce in my area-and I wwas wondering if this was typical of the intake runner for #1 cylinder. 352,360,390,427,428 Ford. Any ideas ???