I'm just starting to break in my 383 and have an engine miss at part throttle. The motor has approx 10:1 compression, CC XE274 cam, MSD ready to run distributor. Timing is 12 initial with 21 mechanical advance. I have the light blue spring and light silver spring in the distributor so all my advance is by 3k rpm. I have the vacuum advance (15 deg) hooked to manifold vacuum. I'm running an edelbrock 600cfm carb to break the motor in. I'll eventually switch to a holley 750HP as soon as i figure out a dual feed fuel line issue i'm having. The engine seems to idle fine at about 900 rpm. I'm pulling about 10in of vacuum. When cruising at part throttle their is a noticeable miss as though a cylinder isn't firing. I'm looking for some troubleshooting tips.
68 Island Teal
Hotchkis TVS with Global West UCA's
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