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bad: The exhaust mainfold bolts going into the water jacket on the cylinder heads. With stock manifolds,the studs almost always come out with the nuts when removing them to change gaskets. With Headders the studs need to be removed to install them. This always causes a big coolant mess every time that the bolts are removed.
There is a fix, at least for me there is, when you have the heads off or in the car (if the studs come out), remove the old studs, replace them with shorter (grade 8) ones to where there is about 2 threads sticking past the nuts, then its easier to install the headers, they slip right on, no more coolant problems, I've done this a few times when installing BBs in my A bodies, Now i used FW headers, BUT, I had no problem getting shuamacker headers.
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