Or to simplify it and save the issue of setting up a jackshaft, you can mount the motor and axle to its own section of frame which then hinges on its attachment point at the front frame section. Like a door hinge, but instead of being the entire width of the frame, having mount points on the frame for your "hinges".
The easiest way I found is to make C brackets (like you would with a spindle) out of flat stock which you then drill to carry the size of bolt you prefer. Cut bushings from black pipe that will accommodate the bolt size to lengths that will fit snugly within the C brackets. Grind the brackets so the outside diameter of the bushings will extend slightly beyond the brackets or better yet, cut appropriately sized pieces of square tube to the length of your bushings, then cut off one side to make another bushing-sized C bracket. Weld these to your bushings to to serve as risers to lift the main C brackets away from the lower frame/engine side. Weld the C brackets to the upper/front frame and bolt 'er up.
All you have to do at that point is build a rail or tower on the front frame to mount your upper shock(s) mount to and set up a shock mount on the rear frame. Mount your engine and live axle to the rear frame section and bingo.
You're straight live axle, no jackshaft, no CV joints, AND you have rear suspension with a little steel, a welder, and some hardware.
