Rpm 340 Cyl heads on a 318 !

Notch the cylinder wall. The bore is small enough that it becomes an issue with the 1.88 valve as far as flow goes but IIRC the 2.02 will hit the cylinder wall or be even closer than the 1.88 valve.
The 202 valve will not hit the cylinder wall. C'mon YR that's some bullshib