What tips and pointers can any of you offer on bolting in a new crossmember? I'm trying to make sure that I get it "square" to the rear axle, if indeed that is what I actually want/need. The frame isn't symmetrical I've figured out, so there is no real "centerline" I can find to use as a reference. The crossmember that was in it before I was the one who put it in, and I don't think that was in perfectly straight. In any case, it won't fit anymore, so I can't use it as any sort of reference. I assume in a stock application, the output shaft and pinion are as perfectly aligned as possible? With no lift, is a small amount of mis-alignment from this going to be an issue? With all the tolerances and wear on the truck, I'm not sure what is the best approach to make sure I get the crossmember in straight.