If you do the layout work with a gasket in place and then pay very close attention to the straight lines you will not have the bumpy sides. On the exhaust ports you want to work on the floor of the port to smooth the flow in a gently increasing radius from the valve to the port. Taking the AIR bump out and flush it to the roof of the port. Pay close attention to the valve guide making it foil shaped and direct the flow from the pocket to the center of the port. Careful consideration is also given to the area under the valve to increase the flow across the seat and into the port. The best home porting jobs are just grinding the ports out to match the gasket and then blending that size into the port about 3/4". Doing that and flushing the AIR bump will do 90% of what you get from a professional job. Keep up the practice to get your straight lines straight and the curves blended smoothly. Your exhaust port should end up about 1 1/8" wide and 1 7/16" tall. They flow pretty good at that size and if the gaskets are aligned with the ports they flow smoothly into the headers.

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Paul
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retired mechanic after 35 years
specialized in Holley carbs and Ford Automatic Transmissions