[Cobra 29]

I have a FMS 351W crate engine (M-6007-A351). It is rated at 385HP. The cam is a hydraulic (M-6250-A351) with roller rocker arms. I do not believe the cam is a “roller cam”.

I replaced the Duraspark distributor with a 8478 small diameter MSD distributor about a year ago but have not driven too many miles. I did not pay any attention to type of metal used for the cam distributor gear or on the new distributor. Does anyone know what type of metal (iron, hardened iron, etc.) the cam distributor gear on the cam is? What type of metal is the standard gear on the 8478 MSD?

I really do not understand the compatibility of these two metal gears. I believe I am hearing from the forums that an iron or hardened iron “roller” cam needs to be mated to a steel gear on the distributor. Does this recommendation change if your cam is not a “roller”?