Sounds like the distributor is off a tooth? When you set it at 12 did the distributor look like it was in the right position? You can be off a tooth and still set the base timing right, it will not run right though. It will buck.
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89'notch
331ci Scat Stroker, Stage II Holley heads, ported Holley Systemax Intake, 70mm Holley TB, 50lb Holley Fuel Injectors, 80mm Pro-m MAF, AFM B-3 cam, Vortech S-trim Supercharger, AFM Powerpipe, EEC-Tuner, TKO, Koni, Eibach, HPM, etc...
Beaten Daily..
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