I just lift mine. I built a "frame" for the firewall out of angle iron, attached through the engine mount holes (drilled undersize for AN3 bolts). The frame consists of two short upright pieces on the outer edges of the firewall (ie one between bottom and top right, another between bottom and top left), which are then tied together with two longer horizontal pieces, spaced to bolt to the mount plate on the engine stand.
When not on the rotisseries, my fuse sits on two saw horses I built for this purpose. The forward sawhorse is short, maybe a foot tall or so, and the rear one is much taller. The heights are such that I can position the fuselage on them and have it be at roughly level flight attitude.
Anyway, with the fuse on these horses, the mount plate for the engine stand is just a few inches lower than it needs to be to mate with the stand. I can roll the stand in place, grab my angle iron frame with both hands, lift it up, and then nudge the stand forward with my leg when it's aligned with the mount.
It's easier with two people, but definitely doable with just one.
Some blurb about my rotisserie setup can be seen here: http://rv.squawk1200.net/2016/07/22/...-a-rotisserie/