There are 2 variables not considered which make the conditions you want to fix: high crankcase pressure producing blowby.
1. what is the original crankcase volume in inches?
the empty space in the oil pan, but above the oil level
the empty space surrounding the crankshaft
the empty space inside the bores below the pistons (including the pistons’ interiors)
The engine’s total internal volume also includes the empty space inside the valve covers and under the valley cover
2. how much larger displacement is the actual engine than the smallest original version (for a 340: 273", for a 400 B: 350", etc.)?

This is why a stroker 400 has more problems than the same size 440: higher pressure and higher pressure cycling due to a smaller container.

This is another advantage to a deep pan: the extra air volume buffers the pressure cycles.