not sure about here, but if you go to bbs.zuwharrie.com, there is a sticky in IFS tech.
i agree, the trail slayer is more than i care to spend, but i am too far invested already to back out. lol
there are a lot of extras in my build i am encountering. complete brake rebuild front and rear, so i might as well upgrade while i am at it... gearing, sandblasting and painting the axles. tires, rims... etc, etc... it is getting pricey.
you can lift your rig enough to clear 31s or 32s by installing a 3" body lift and a set of coil spacers with the strut mount flip and (not sure what year) crown vic rear shocks. you can probably get that done for less than 4 bills i would think...