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Bored&Stroked · 05-05-2021, 11:41 AM

If you've got a NOS 21A cam and bolt-on gear - just use it. The valve angles didn't change until the 59AB series and even then - I've not seen a modern cam grinder ask me if I was running a pre-WW2 cam and engine or a post WW2 cam and engine. There are very few of us that even know there is a slight difference - probably not enough to even tell on a dyno.

05-05-2021, 11:41 AM	#3
Bored&Stroked Senior Member Join Date: Jan 2011 Location: Central Ohio Posts: 5,070	Re: Installing Cam Gear on 1936 Camshaft If you've got a NOS 21A cam and bolt-on gear - just use it. The valve angles didn't change until the 59AB series and even then - I've not seen a modern cam grinder ask me if I was running a pre-WW2 cam and engine or a post WW2 cam and engine. There are very few of us that even know there is a slight difference - probably not enough to even tell on a dyno.