302 head progress and questions

Imo, there isn’t any way to take pics of the short turn that will actually illustrate the shape you’re going after.

A subtle change that keeps the port from going turbulent.......or not...... isn’t really visible by looking from the bowl side, or port side.
I make those adjustments based on “feel”.
Without access to a flow bench, as a means to determine what shapes work and what shapes don’t, I don’t see how you’d ever “get there”.

That’s not to say you can’t make improvements without a bench, but if you’re working on heads that have the tendency to have a turbulence issue...... it’s unlikely you’ll ever get them to be “great” without that knowledge base gleaned from flow bench testing.