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I have a new MSD dizzy. It has a mechanical roller cam part # M-6250-A514, do I need to run a bronze gear? The dizzy has a steel gear on it now. I also do not know the firing order. I bought the motor second hand, but it had never been put in a car yet. I have the paperwork with all the spec, but the firing order is not mentioned. Thanks.

Maybe if you see this Lem you can point me in the right direction.
 

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You do need to run a Bronze gear if it's a roller cam. The firing order 1-5-4-2-6-3-7-8
 

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Depending upon WHICH roller cam material your cam is made from will determine which distributor gears are compatible with it.
8620 needs a bronze gear.
6150 or other through hardenable steel core, as a FRPP 514 crate motor roller cam is made from, can use a STEEL, (NOT cast iron), gear as well as bronze.
 
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