I did it in steps to see what each item would change. I wanted to first install the z pipe, and to do it the way I wanted to retain all factory hangers and slip joints while keeping the stock exhaust I had to cut and weld the stock H pipe further upstream to create enough room to add the z pipe after it but before the stock slip joint. it’s essentially a factory exhaust still as far as the fit and finish and hanger/clamp locations just with a z pipe after the H pipe.
Keep an eye out for the post tomorrow, it should answer any and all questions about it.