You could probably do it, but do you have the room? Most porcelain toilets sit further forward or further out from the wall than a MH toiled does due to the water bowl behind the toilet. This would cut into what little floor space you have in the bathroom.
When you do move it, I'd drain the porcelain toilet water tank. House hold toilet tanks are meant to sit still. When you go down the road with all of the water weight moving around in the tank, water could slosh over the top or the tank, or break off those four little bolts holding the tank to base. They're only meant to provide a tight seal between the tank and base. If the break the tank the toilet is out of commission and you have 4 (?) gallons of water all over the floor?
Bill