Thanks for the input. Here is a complete set of exhaust manifold bolts in use. Two of the three long sleeve nuts have damaged heads. The stud from the head goes through the manifold. The sleeve nut goes into the manifold and catches the stud, maybe a 1/4 inch, the bottom of the nut butts up to a sholder in the manifols for tightening. I'm waiting for my welder to have some free time, he's delt with this before. He'll put a bolt into the sleeve and weld it to the nut. With some heat it should back off. One sleeve nut and all the other nuts came right off with no effort, no rust or corrosion.
--I'm guessing the bolt is like the ones in the link below. Having the engine out of the car is definitely very helpful. If it were mine, I would probably try to drill it out. It's probably the same diameter as the other studs. So i would maybe start with a small diameter bit just to get a hole started and centered. Then you could go to a bit of the same diameter as the bolt, NOT THE HEAD but the bolt. Then as soon as you drill to the depth of the head it will be easier to add a little pressure and get it to pop loosel. It should then slide off, maybe with the help of a little penetrating oil.https://www.grainger.com/category/fasteners/socket-screws-and-set-screws/shoulder-screwsPaul L.On June 9, 2019 at 8:36 AM "'Paul L. http://1962to1965mopar.ornocar.org/ml-le' via The 1962 to 1965 Mopar Mail List Clubhouse" <1962to1965mopars@xxxxxxxxxxxxxxxx> wrote:
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