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magnum heads are 63CCs?
Also are these slanted spacers available somewhere, or are they something I'd need to make (or have made by a local machine shop?)


I cc'd mine at 63 they were a new bare set & I had my head man put chevy 1.94 & 1.6 iirc valves in them. The ex valve size is listed at 1.625 but the seat is slightly smaller than that so the chevy 1.6 ex valve fit perfectly. He reamed the guides from 8MM to 5/16" no problem. Ths slanted spacers I have not done but I remember a buildup from way back & thats how they handled that issue. Eyeball your particular manifold where the vertical holes would be redrilled at & if there's nothing that would interfere with the new holes then you or your machine shop could certainly make them up.


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