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A few cam grinders I can think of:
- The usual still active ones: Webcam, Elgin, Dougherty (not sure if he was around back then). The designation doesn't look like any of theirs.
- Garretson, the GE20, 40, 60, etc. Doesn't look like theirs.
- Logicam (formerly Dial-in Cams) - they did 911 cams for a while. I think I might have had a set of theirs but couldn't find a reference anywhere.
- Crane - they did Porsche cams for a while. I think their designation was p-xxx.
- Integral - they may have been around that long ago? Not familiar with their designations, might be worth checking.
There are others today, not sure what else may have been around 1990-ish. At the end of the day, if you measure them to get lift, duration, and lobe centers, you'll have most of the info. you need.
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