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  1. pappy

    Exhaust Manifold questions (20R)

    Also, in your pic, the one stud/nut combo doesn't look right. The nut is wrong, and I think the stud is too short. I wish I had part numbers for you, but the studs used on newer engines have a torx head on them. That lets you install them easier. Plus, you can hold them in place while you...
  2. pappy

    Exhaust Manifold questions (20R)

    Don't ya just love previous owners?
  3. pappy

    Exhaust Manifold questions (20R)

    Oh, those studs are M10-1.25 if I remember correctly. You might start researching the installation and source of Helicoils/Recoils/thread inserts.
  4. pappy

    Exhaust Manifold questions (20R)

    I would not replace the studs unless you need to. Ya know, if it ain't broke. Yes, they can be a problem. Oh, wait, they are a problem after 40 years. Just be careful, and as you are doing, soak the crap out of them. Go buy a lottery ticket if you get them off without issue. Ya, replace the...
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