Picture of 340/360 head porting....Mistakes?

I'd remove that roof kink. I would more 90-degree off That straight side short turn and I would leave that whole straight wall in rough finish from the carbide bit. And then run sandpaper over the entire dogleg wall.
I would also put an angle right at the peak of where the push rod pops out into the port window. That's after I grind it to be about .060 thin. Assuming the shirt side is laid back only a hair... I would work the approaching ramp down flatter across wall to wall... meaning mostly the straight side. Leave a lik lip on the top of the turn.