Sam, I will be calling maybe tonight..
Contour, no problem on the exhaust..hope it works well for you. Ok, first, are you sure you have returnless? It's very easy to check, if you do then here are some things you would have to change.. Injectors, fuel rail to name a couple. The only reason my 00 svt engine stayed return on my 99 is because the guy that installed my engine kept the fuel rail, intake manifold, throttle and injectors from my 99 engine. It works very well, haven't had a problem yet. Hope that helps.
Eric