Sorry Dave, the 'tootsie' roll is nothing but 60 grit abrasive cloth wrapped in a roll approx 1/2 inch thick and 1-2 inches long. I didnt use a carbide/High speed steel cutter because the alluminum is removed very quickly and the pushrod opening is far down into the head and with a 6" arbor and a mini-grinder I was able to quickly achieve the clearance in about a 1/2 hour with both heads laid out.
http://www.summitracing.com/parts/SAI-260001/?rtype=10 The tapered abrasive rolls are pointed allowing you to get at the pushrod hole opening. The straight cylindrical rolls are great for getting at the pushrod cut into the intake port and removes material fairly quickly but not so much that you 'break' into the port itself. I then cut thick plastic into 4" long strips 1" wide. I miked them with a Vernier Caliper and they showed .030 thick. I then used these strips as a 'guage' checking for clearance. Either they will 'wrap' them selves against the pushrod and port and slide down or they are too thick and wont do that. I would remove material and re-mount the heads after thoroughly cleaning them with high pressure water and alluminum detergent soap. Blow dry with high-pressure air and re-mount them, torque the head bolts and re-check. It was tedious but I only wanted to remove enough material for clearance because I may heavily port the intakes someday. As I said previously, I used longer hyd. roller lifters, Custom made 1.6 Ratio Stainless Roller Rockers, and I'm sure this affected the angle, albiet very slightly, into the head. Flat tappets with a different Rocker system might have a different angle, either way this abrasive kit or one like it should get the desired results.