Here’s a 346 with a little more effort and slightly bigger bowls.
Ferrea valves, still 2.08/1.74...... but with back cut:

Lift——in/ex
.100— 69.6/59.3
.200—138.3/104.1
.300—201.7/141.8
.400—246.4/169.1
.500—263.4/190.2
.600—267.2/205.0
.700—272.9/212.0