Is the #6299 different from the #8007 390 CFM 4160 Holley? The #8007 has one power valve, since it's a 4160 there's only one metering block IIRC.
I/I #4101 '71 GMC Jimmy 350, sm465, np205,3.73 posi. '68 C/10 Stepside 292 (.030 over) Offy Intake, 500 CFM AFB,Clif headers, sm465, 3.73 posi. '67 K/10 454 project. '72 K/5 rolling frame project.
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