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  • Title: Marcos 66 GTO 389
  • Description: No description
  • Owner: Gallery Administrator

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Here you have a direct comparison of the OEM Muncie Case and the Heavy Duty Case. Notice that the ears are much stronger and better suited to handle huge torque loads.

Marcos 66 GTO 389

  • Here is a shot of the date code. This is the only number that matters and you cannot see it from outside the valve cover so you have no worries about it. That makes it easier for all of us. The number is correct on the outside also.

    • Here is a shot of the date code. This is the only number th…
    • Views: 875
    • By: Gallery Administrator

  • I have taken the press in Rocker Arm Studs out of the heads and now I can thread them for the Screw In Studs that we have had made specially for you. I did not have a source for them until now.

    • I have taken the press in Rocker Arm Studs out of the heads…
    • Views: 910
    • By: Gallery Administrator

  • Matter of fact no one anywhere has these. Only I do and I have yet to advertise them in my web site or on the Internet. I will shortly but I want to thread them into your heads first. Then we will sell them to the world.

    • Matter of fact no one anywhere has these. Only I do and I h…
    • Views: 788
    • By: Gallery Administrator

  • You can see that most of the time the Exhaust Flanges are rusted and this makes the Exhaust Manifold prone to leakage at the gasket. I do not like these things and will angle machine the flange to eliminate such.

    • You can see that most of the time the Exhaust Flanges are ru…
    • Views: 844
    • By: Gallery Administrator

  • In the case of the outer Exhaust Flange the corossion is quite obvious. In this case there is not an option to attempt to pull a Fast Food Machine Shop Fix. Not that I would anyway.

    • In the case of the outer Exhaust Flange the corossion is qui…
    • Views: 788
    • By: Gallery Administrator

  • If the heads look like this then I will not put them on a customer's car. If it ain't good nuf for me it ain't good nuf for you and that is a fact. They will look mint when I finish them.

    • If the heads look like this then I will not put them on a cu…
    • Views: 851
    • By: Gallery Administrator

  • The cheap fix is to take JB Weld and spread it onto the flange with a squeege. Then you let it harden over night while having a junk manifold torqued onto the head.

    • The cheap fix is to take JB Weld and spread it onto the flan…
    • Views: 801
    • By: Gallery Administrator

  • You put a piece of Wax paper against the JB Weld and the Manifold Flange. If you are lucky the wax paper will not rip and the manifold will come off the next day. The rusted areas will be filled.

    • You put a piece of Wax paper against the JB Weld and the Man…
    • Views: 745
    • By: Gallery Administrator

  • And then you will have to take the time to grind and file off certain areas so that the flange will look good. Then you put on the manifolds and pray that they will not leak for about a year or so.

    • And then you will have to take the time to grind and file of…
    • Views: 764
    • By: Gallery Administrator