Dave,
Scoti is correct, They sell wedges that will allow you to adjust pinion angle. But depending on your truck, your center of gravity could be higher or lower than mine. If it is higher than mine, then you will have more A/S then me right off the bat. Check out this link from pro-touring.com Norm and others do a great job explaining it.
http://www.pro-touring.com/forum/sho...ight=antisquat