[Firebird-Geek]

Then with help from my step-daughter, we hung plumb-bobs off of suspension points and location holes in the frame to square the subframe to the body.

This actually took MUCH longer than I thought it would, I would say we put almost 2 hours into getting it just right. We got it under and 1/8 of and inch difference between the cross measurements. (I think I read somewhere that GM used up to a 1/4 of an inch tolerance in this area.)