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Thanks Bob! Thats exactly what I was talking about. Now do you know of a step by step method to doing it? It looks as simple as taking a ziz wheel and carving a groove, but surely it cant be that...

Has anyone ever heard of cutting grooves in the valve area of the heads to allow a 10.5 ish motor to run on regular 87 octane?

I read a snippet of this once and am interested in doing it.

Any...