Having the car on a lift makes it super easy. I don't know if you can get to the bolts from the top of the engine, even if you took the intake manifold off. I wonder if you can leave the stock cat in place and slip the old exhaust manifold out and replace it with the new one? Take some pictures and post a how to thread. I think you would be the first person on this site to use them, except maybe Bob who helped in the design.
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