I've been putting a few miles on my new drivetrain in order to get everything broken in, fix a few minor leaks, and work out my well documented AOD issues so that I can get it on the dyno. I've been traveling quite a bit lately for work, so this process has taken longer than expected. Last week, I finally got it in the shop to install a fresh set of plugs, re-check the valve adjustment, install a new MSD distributor with a hardened steel gear, swap the transmission pan with a deep, finned aluminum pan, and change the oil and transmission filters and fluid with synthetic. All set to hit the dyno, right??? Nope!!! Keep in mind that the engine has run just fine all this time, but now all of a sudden it intermittantly starts breaking up badly at around 2000 rpm. It will spit, sputter, and nearly shut off for a minute or two and then clear back up until the next time. I took the car over to Carter Racing Enterprises here in Savannah where I'm having it dyno'd, and it did it's thing right there in the parking lot for them. They explained to me that MSD can stand for My Spark Disappeared. They agreed that it acts like the ignition is just breaking up for some reason. Since the distributor is new and the 6AL box is used, that seemed like the logical suspect. This weekend, I replaced the MSD box, the coil, cap, and rotor... no change and seems to be getting progressively worse. This week, I'm having the old, used MSD distributor (with the bronze gear) put back in to see if the new distributor is the problem. Anyone experienced anything like this before????

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'67 Mustang Coupe
424W-KB Forged 10.2:1-AFR 205's-Victor Jr.-Mighty Demon 825-Comp Cams hyd roller.236/.242 .555/.576-Miller rockers-Hooker Super Comps-Gene Hughes AOD-Broader Performance valve body-3.55 Posi-4 wheel discs