drive line angles
The center lines of the crankshaft and the rear end pinion must be paralled in both up and down and left to right. I didn't read the spicer posts again but I think they have a chart to compute the actual angle using both the up and down and side to side numbers. When I first looked at the 2003 Ford GT (modern version of the old GT 40) the drive shafts run offstet front to back. looked weird since I was used to looking at corvette and Jag rears. AS long as you don't get too radical it should work just fine. A lot of jacked up 4 X 4 trucks have high U joint wear because of excessive angles they run.If your trans is too close to the ground on a Z ed frame You can raise the trans up and then buy carb mount wedges, They are used a lot on boats. If you are running multiple carbs it might require a regular spacer and a wedge to get the linkages to work best.