Rear suspension not center

[heel97]

Not sure what I am missing here but took the rear suspension down from my 64 c10 stepside to replace trailing arms, shocks and crossmember, and springs. Put new bushing in pan bar, but now that everything is put back together it seems that the rear axle is not centered under frame. Trailing arms lined up with the axle perch and was just using original style parts. Can someone point me in direction of what I have missed or is this normal. It seems the left tire sits out from frame more than right. talking maybe a 1/2 when I take measurements. If this is not normal then how to I move axle back toward the right?