Javajoe,
Per your second set of dimensions, it appears that with the pinion shaft inclined 2 degrees above horizontal, it is parallel to the first section of driveshaft coming from the transmission at 2 degrees below horizontal, and therefore the operating angles of the u-joints on each end of the second section of shafting are equal, which is what you want for a constant speed ratio across the shaft (assuming the yokes on the shaft are phased in the same plane).
You could also achieve about the same thing by angling the pinion down by about 2 degrees, but in this case the relative location of the u-joint centers enters into it, since it is not the inclination angle of the shaft and pinion that you want to match, it is the angle of operation of the two joints, which may be different depending on the vertical location of the joints.
Properly set up, the second option is probably superior for joint durability since the joints would be operating at about 2 degrees deflection instead of about 5 degrees.
Caveat: You have not stated the inclination of the transmission output shaft. If it is parallel to the first driveshaft section, everything is fine, as above. If not, the operating angle of the first u-joint will introduce speed variations into the system.
If you really want to get into the technical issues, suggest obtaining the following SAE paper:
http://papers.sae.org/660413/It would probably be best to adjust the 4-bar linkage to minimize squat and keep the axle where you want it located.