head porting question

You will need a long shank carbide bit and larger chuck grinder.

Remove the kink, it will increase the flow and rid some turbulence on the roof, with blending the seat too, you could pick up about 25 cfm and be in the 235-240's range.

grind out the roof hump/kink profile the last 1/2 of the guide and blend the bowls-done.

You would be doing wrong if you opened the pinch up at this level, so don't worry...you are good.