On a slightly related note. Back in 1970 one of my neighbors was none other than George Cummins and he told me all kinds of stories about the Cummins Indy car but never said anything about Le Mans His storys usually ended up with "Dad finally said it was too Da-- expensive to keep the dust...
Should I grind the intake valve faces and remove the black coating or just instal them as is. I chucked them in the grinder and they show no runnout with a last word indicator (0 to 0.001") and the finish is visually smooth using a 500x surface comparator.
