Awesome Jude which one did you go with?
I got the performance with gas shocks from cruiser parts. They have a 15% off sale on Iron Man right now. I got the kit for $654. The constant load and performance use the same torsion bars the rear springs are 880 lbs (constant) or 660 lbs (performance) over stock springs. I could have got the foam shocks for $100 more. The gas shock is a good around shock and the foam is geared more for high speed washboard type stuff.