'69 Dart rear suspension kit questions (RMS and ControlFreak)

I just finished installing a RMS Street Lynx in my 69 valiant. Went in really slick and easy. Haven't had it on the road yet. I'm just about to drop the motor in (also on a RMS front end kit). I bought some 17's that were on a mustang 235's I believe, but not totally sure. Will check and let you know.