Well that is exactly the answer I was looking for. I didn't spot that in the archives. Well does anyone think that I could mount the right type of flange on a universal cat and do the rest of the exhaust from there, bent tube, flexpipe and the rest of the works.

Or another idea would be to run a straight pipe down, then mount the cat horizontally, and extend the wires on the O2 sensors? or do they need to be in the exact factory position?