[steverino66]

Here's the best I could get:
crossmember at front of trailing arms:
measuring front to back on bottom edge: 4.75"
width across truck side to side, at center to center of rivets holding crossmember to frame: 31"
height of crossmember inside frame: 5.75"

length, front to back of trailing arm, measuring bottom edge and along the curve and including bracket to front trailing arm crossmember: 58-1/4"

distance between u-bolt centers holding trailing arms on rear axle: 41.5"