I think you should either have the con rods and pistons out the bottom off the crank for legs, or else have them upright in the cylinder and a small electric motor that turns the crank about 8 rpm so you can see the camshaft rotate and pistons move.
Or else line the cylinders with fabric and drop your bottles of liquor in there! Now that I think of it, you could have them raise or lower your booze as they turned.
Or else line the cylinders with fabric and drop your bottles of liquor in there! Now that I think of it, you could have them raise or lower your booze as they turned.