[PatBuckley]

I have run into the same issue - the engine not sitting parallel on the frame.

The holes that the mount studs go into on the frame are elongated - so what I did is loosen both mount fasteners (don't take them off completely), jack up the engine on the side that is low, spray some sort of slippery stuff between the mounts and frame and then drop the engine onto the frame.

Worked for me.

I am assuming you mean parallel in the sense of "level"?