Your browser may be different from mine. Anyway, look at their "Classic IFS" system. It uses 73-87 Chevy truck spindles & brakes.
Their "Extreme IFS" Has the option for 1/2 and 3/4 8 lug, which may be what you're looking for.
On a side-note, the Fatman setup is a little on the pricey side.
Like I said before, their's nothing wrong with a traditional MII kit either. The wheel bearing for them are the same as what was used in Ford 1/2 and 3/4 ton trucks for years. Most of the MII kits use Dodge style ball joints, again the same as what was used in 1/2 and 3/4 Dodge trucks for years. There are lots of manufacturers of MII components out there. If you find a kit with 3/16" A-arms, they're about as strong as it gets.
BTW- Full tilt has the said, 3/16 A-arms.
http://www.fulltiltstreetrods.com/frontsusp.htm
Couple the MII suspension to a Ford 8.8 rear and you'll have a good ride able to do anything you want. My 09 F150 has a 8.8 31 spline rear, it weighs 6000 lbs empty and has an 8000 lb tow rating.