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Hi John,
The chipping at the edge of the cylinder sealing surface is, I'm afraid, a result of the machining that was done to accept a sealing ring. This left a very thin surface at the edge. It could possibly be welded, bored and replated, but I would consider replacing the chipped cylinders myself. (I have an extra set of 964 cylinders and Pistons. PM me if you're interested.) As to the rockers, how do the cams look? Because the cams and rockers wear together, I have never been comfortable just replacing one or the other. My own 964 cams were started to show some spalling, so I had John Dougherty regrind them to. 993SS spec and also had all the rockers regrind.
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1990 964 Coupe
1986 Carrera 3.2 Targa
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