Two places:
Schneider Cams in CA. According to their website, they have the original lobe patterns for this grind.
https://www.schneidercams.com/
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Salt City Speed Shop
https://www.saltcityspeedshop.net/
The took over old time grinder Pete's equiptment and lobe patterns.
Schneider Cams is an excellent source for the Potvin 3/8 Super. For the latest Ford flathead engine we are just completing the cam is the 3/8 Super from Schneider. Checking the cam timing which is critical to do for any flathead cam installation I can relate the cam was spot on perfect to the cam timing specifications. That's not easy to do when a cam grinder is reprofiling an original cam.
Ronnieroadster
The Potvin Super 3/8 is a great sounding cam. I had one ground by Bill Jenks when he was still alive. It's still sitting in the box waiting for me to do something with it.
Schneider Cams is an excellent source for the Potvin 3/8 Super. For the latest Ford flathead engine we are just completing the cam is the 3/8 Super from Schneider. Checking the cam timing which is critical to do for any flathead cam installation I can relate the cam was spot on perfect to the cam timing specifications. That's not easy to do when a cam grinder is reprofiling an original cam.
Ronnieroadster