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Re: 69 Chevelle SS 396 falls on face
Welcome Aboard!
I'm guessing that is starts and idles just fine. When the secondaries are opening (lower gear, 3/4 throttle, 4,300 RPM) is there any hint of slight popping or backfire in the intake? That could indicate improper valve timing.
I'm not sure what a "350HP" cam is, but can you I.D. the cam or post profile specs? That may be a hint/guide for setting the secondary AV windup spring and metering rod/hanger selection.
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