They might be obsolete, but I never had a problem running speed pro file to fit rings on a bore honed with torque plates and a plateau finish. My machinist was a little leary about using Total Seal rings in a street car.
I wasn’t talking about using a gapless ring. Total Seal makes much more than gapless rings. And there is a right way and a wrong way to get the correct plateau finish. If you don’t verify it with a profilometer you have no idea if it’s right or not.
