I use a tram for the ones marked ďTĒ. As far as the center of the holes I just eye ball it. I use a laser, and plum bobs. Iíve built a frame jig for the cars I do. That way I can see if there is any other problems. Then I brace it, a lot. I check everything again, and start cutting.
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94 Cobra, on a rotisserie right now