Sandy - I ended up fine tuning my driveline angles with a 2* wedge. (68 Hemi Runner, Auto, 4:10 D60) Fairly certain the spring mounts were not relocated by previous owner. I can check the offset of the mounts to the snubber pad on mine tonight with a digital level for comparison to your D60. Assuming the snubber mounting pad is machined parallel to the pinion shaft axis??

68jim