Moser Now offers 12 bolts with 35 spline axles with a spool. They are rating them for 800-1100 hp with a Pro gear (9310) steel. Figure with a street gear (8620) steel they would be good for around 600-800. We are having a sale for $2100.00 plus shipping with in the 48 states and the parts include:
Strange or Motive performance gears
Moser Spool
Moser housing and axle package
Strange billet pinion yoke
Timken bearings with solid spacer instead of crush collar
TA Performance cover
Set up in house with BMR welded on swaybar brackets with hardware

Options:
NIB backing plates are $96.00 each and are in stock
Gun drilling add $100.00
33 Spline True Trac $275.00
3 Channel ABS $100.00
4 Channel ABS $100.00 without Rings

PM us for more information on our custom assemblies