Two Step W/cop Conversion?

[Cupples981]

I am planning on installing a Pi engine, complete with cams and cop coils on my 97 gt. I intend on keeping my original ECM. If I get a cop conversion harness will I be able to use a two step? It seems like this msd controller will work with the harness, but then again I may be wrong. Any ideas??

Msd two step I'm looking at getting-
http://www.americanmuscle.com/msd-launch-master-2step-9910gt-install.html