Seller notes

MSD Part Number 8566 Fits Olds 260, 307, 330, 350, 400, 403, 425 and 455 V8 Engines . Must be used with an MSD 6, 7 or 8-series ignition control box. Sharing the CNC machining techniques with the rest of the MSD Distributor line, the Olds housing is machined from high quality 6061-T6 aluminum. Adding to this strength are two sealed ball bearings that guide the 0.500" shaft accurately through 10,000+ rpm. TIG-welded on top of the polished steel shaft is MSD's adjustable mechanical advance assembl...

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