[Formulajones]

Originally Posted by mgarblik

I agree with this set-up for best reliability. A stock Pontiac distributor, curved properly, with a working vacuum vacuum advance, possibly limited a little based on engine set-up. I do prefer cast iron like mentioned here, but aluminum body is fine also if in good condition. The slight down side to the iron unit is availability of a correct distributor gear. They use the smaller roll pin for retention. So if using a new gear, the shaft will need to be opened up to fit the larger roll pin. I do like using an MSD box for faster starting, keeping plugs cleaner, and just better, sharper driving characteristics at low RPM's, under 3000 RPM's. Above 3000 RPM, an MSD really does nothing. It's a single sharp spark.

Yes, that last sentence is exactly why I'll use them.