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  1. #26
    FEP Supporter Broncojunkie's Avatar
    Join Date
    Jan 2015
    Barboursville, WV


    Ok I believe these are Mac headers. Can anyone confirm? I gave them to a buddy of mine recently and he's using them on his gt40p's. Just thought I'd post a good pic for reference. 90 degree boots with a heat sleeve on the rear plugs and he should be good to go.

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    Edit: No, he's not using the OEM springs. He was just throwing these on to see how they fit. He's actually in the process of putting on/ setting up the Trickflow spring kit as we speak. He lapped the valves, cleaned/painted the heads, etc. Hope to have the engine sitting in the car next week.
    Last edited by Broncojunkie; 05-20-2019 at 01:26 PM.

  2. #27
    FEP Power Member STL79Coupe's Avatar
    Join Date
    Dec 2009
    St. louis MO


    Yes those appear to be MAC's. They don't have a one piece header flange like most others. On my P setup I only had a close primary on the 5 cylinder, but i had BBK longtubes.
    Keith formerly STLPONDS
    '79 V8 coupe in the works!
    Build thread

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