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  1. SBC 406 Help/Validation on low Vacuum Reading @ Idle

    General Rodding Tech
    Hi I am needing a little validation on a SBC build. I tuning on an 88 S10, and have a steady 8" of vacuum at 950 -1050 rpm. The cam is fairly large solid flat tappet. The specs are below. I think I am OK, but would like some opinions. S10 weighs 3100 with driver SBC 406 = 9.81 compression -...