Reply to "Need help with ignition setup and Bad MSD 8350"

Of electronic ignitions, the Ford Duraspark ll from a stock Ford 460 is the only one I'd consider. It is a drop-in conversion from a Ford 460 to a 351-C and has stock vacuum advance. No tach adapter needed either and the brainbox is about $45 at any auto parts store in N. America. The distributors never fail. The only downside is, it has a truck advance curve built in but all that can be adjusted; parts from your old dual-point distributor will fit a Duraspark.
FWIW, the Pertronix conversion is the only electronic ignition I've ever found that can sometimes PARTIALLY fail- the engine will often keep running and starts, but will not rev. All the others- MSD, Mallory, HEI etc- when they fail, you stop dead.
Also FWIW, I'm told MSD uses Ford parts in their billet distributors that do have better bearings, but their brainboxes are unique- and expensive.
Finally, ALL (100.0%) of these high-buck electronic aftermarket distributors for 351-Cs come with the same fragile crack-prone roll pin that you've already had experience with. They all need to be upgraded with dual pins or at least a bigger & better pin than what MSD, Mallory and all the rest supply. That includes the Duraspark.