The Building of the Blue Mistic

I had measured 12 3/4" from mounting point to mounting point. I am trying to decide, monotube or twin tube. If I get twin tubes, I am ordering a set of QA1's with 450 Lb springs.

If I go monotubes (which I am leaning towards), I am going ridetech with the 450 lbs springs:
http://www.summitracing.com/parts/art-24049901/overview/