Car is smoking
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The Best V8 Stories One Small Block at Time
1. get some high flow cats and plug your downstream O2's back in.
2. get some O2 simulators and leave the exhaust how it is.
3. get a tune and have the downstream O2's deleted from the PCM.
I wouldnt get a tune until you really need one though. They are expensive and I would wait until you get some other stuff done to your car before I would spring for a tune. That way you would save some money in the long run. I think the best choice personally is high flow cats in my opinion. The cheepest is probably O2 Simulators. Go with whatever you want though.

