Best quality you can buy nowadays for a CVH is a Schrick camshaft. They only sell a 276° one, which is about the same as the car had factory-spec.

Be careful with camshafts that need "cam lobe". This means the companies use stone-age machines for grinding and finishing, so the last finish is done in YOUR engine. Which means you'll have the cam lube and little metal fragments in your engine and this is the last thing you'd like to have. And after all, this kind of "finish" is NEVER as good as when it's done by a proper and modern machine.