[vector1]

i would block the car at ride height without the shocks with your axle blocked to the same height as the wheels if they were on.

check the pinion angle to see if it is close to whatever you want, you can measure the angle of the engine/tranny by using the centerline of the tranny output shaft and center of the front damper and use the bottom of the frame for reference, that will get you close and give you an idea of the drivetrain angle.

find the centerline of the frame then mark with nail polish or marker so you don't have to do it again. drop a plumb bob off these marks to a string ran down the center of the car.

you need to drop a plumb bob off each side of the rear axle to triangulate to some point at the front of the car to put the axle at 90 degrees to the centerline, which will be your thrust angle. you can put the thrust line slightly to the right but never to the left for drag racing, centered for normal driving and road course. no more then 6-7 degrees to the right to give you an idea if you know what that looks like.

either before the above or after you need to set the panhard bar to center the axle also, probably have to do the above and the panhard bar a couple times. i like to put a level across two of the wheel studs then drop a plumb bob off the bottom stud, just make sure to either use the front or back of the stud on each side, then you can use this to triangulate off the front for the thrust line also. use a marker on the floor or taped piece of paper, plan on a few marks.

recheck the pinion angle.

the machine will make the alignment off the thrust line of the rear wheels so you want this close.

once you get everything where you want it you can turn each link bar so that it is centered in the threads, ie each bar should turn easily to the right then left then center between these two. do this on all the links & panhard bar and you should be as close as you are going to get, lock the joints with nuts.

on the front end make sure the steering arm joints coming out of the rack are centered right to left on the frame and not the rack when doing the alignment, some of the racks are offset.