I run autolite 65, not sure what you're saying about it was set as big block. IIRC BB turn in the opposite direction and it would only run if the distributor was locked out. You can use the vacuum advance plate to fix rotor phase issues, but you can't use it as a vacuum advance anymore. Search online for msd rotor phasing video. Very good video. The vac adv changes timing by rotating the pickup around the shaft, unlike mechanical adv. I had bad phasing and just turned the vac adv plate until the phasing was fixed and then screwed the plates together, but I dont run vac adv. also check the burn pattern on the distributor cap, mine was on the roof of the terminal not the vertical portion.
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