you can try and line up those bumps, but if your pinion angles are not even close it could move things enough to undo what you did for the bumps later.
right now, are you at a point you can put the wheels on and get it onto it's own weight?
it's a PITA but you wanna get your pinion angles at least close 1st, or adjustments you make for the bumps may not jive at the pinions when you set it down. front pinion 6-7* rear is dictated by what driveshaft your gonna run with.
once you have the pinion angles close (then put the stands back under the frame) you can pull the wheels, springs and bottom of the shocks..........then lift that axle level up to the bumps. it's kinda funky to balance be careful.
it doesn't matter if when the axle reaches the top height it's not perfectly flat at those bumps as long as you can get a good contact patch (your pinion angle is more important).
now you can begin to line up those bumps. but your going to turn every arm = amounts to get there so the relationship you gave for the pinion angle stays close. this will ensure your close enough not to offset the bumps if you need a little tweek for pinion angles to dial things in.
if the axle is straight then all adjustments (upper and lower both sides) will be =, forward or back to get to the spot of good contact. (only loose 1 arm at a time or shit can get silly real quick)
if it's crooked and 1 bump is close and the other is an inch away your gonna turn both upper and lower arm on the inch away side the same amount to maintain the setting of the pinion. once it matches the other side proceed to all = adjustments.
so much to think of...............start here and then we'll field questions b4 more text just confuses things if i keep rambling.
and others may have another way or order of progression but this is how i do it.
if they wanna chime in and know an easier way........ plz do.