Originally Posted by burtonboard180
however i dont have an engine tranny or tcase in yet withh that weight decrease the angle any? any input would be greatly appreciated!! thanks
Yes, that will significantly affect spring compression, main leaf length, and ultimately the pinion angle. Don't make any changes until you get the suspension under load with the approximate running weight of the vehicle. If you change the perches now, you'll just piss yourself off after you install the driveline and everything moves.
However, CSP's point is also perfectly valid and something frequently seen. Check the "engineering" and see if the components are even in the ball park as far as location (spring hanger at the front).