ok, maybe not NO point. just threw that in there are a quick response, apologies on that.
What i mean is, looking at some of the obstructions on the intake side makes me wonder how these things fed cylinders evenly. milling the intake off allows for that to be removed, and while the head is off, you might as well. then again that phrase gets tossed around all to much in my shop!
more sanding rolls a few more burrs the ultrasonic thickness gauge on order. until then, playing it safe and setting the new powdercoating oven.