Drive Shaft Angle Question

[rogeroadster]

My generic question concerns almost any early ford with a closed driveline. Given that the rear end angles up toward the trans at about 3 to 5 degrees, where is that angle established? Is the angle built into the crossmember or is it built into the spring hangers? Some other means?

 

[Andy]

Built into the crossmember. Plus the crossmember being an open channel, is not torsionally stiff. This lets the spring rock to reduce stresses. The spring sits 90* to the driveshaft.