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Re: Sbc Falling on its face..
What Lunati cam? What cam came out of it and what oil are you running? I agree with a little more timing as well. My Lunati cammed (10120701) SB 350 likes 15-16 initial and 35+ all in at 3500. With that said and all cam lobes still intact with a zinc ladened oil, then you can bet it's the carb. Your previous cam may not have revealed a weak shot or even a rich shot where the new cam with a different vacuum signal and grind would.
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Michael of the clan Hill,
"Two Seventy Two's"
71 1-ton Dually 350 4-Speed
71 C/50 Grain Truck, 350 Split-Axle 4-Speed
02 3/4 ton Express
14 Indian Chief Vintage
1952 Ford 8N, "Only Ford Allowed On The Property" 
"Be American, Buy American" 
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