[joedoh]

I understood what you were saying. what I and everyone else is saying is, make the engine point straight back in the frame. the axle points straight forward in the frame. no matter the offset, as long as the motor points straight back and the axle points straight forward, the angles at the front and rear will CANCEL. no matter if the pinion output is offset an inch, two inches, five inches. same with the engine, as long as the trans output is parallel to the pinion, even if the engine/trans is offset an inch, two inches, five inches, the working angles of the driveshaft will cancel.

so slot your trans mount hole, move the engine trans so its pointing straight back in the frame (at most an inch, which is why others are saying it wont matter, that 1-3 degree thing) and leave the critical pinion angle setting to the up-down/y axis. if you think about your green line as looking sideways, instead of top down, you will see what you need to do.