Restart the rebuild

Well I'm definitely not a porter but I used 60 grit rolls to finish the couple of heads and intakes I've messed with (or messed up?), in theory you can go bigger at the throat (89-90%) but better to have it a little too small than too big from what I can tell. If they were mine i would probably smooth those 2 spots out but I'm sure others with more experience will point you in the right direction.