No, that is not recommend, because of the extra strain on the bearings due to the leverage from being out wider. Plenty do it and get away with it, but the original engineers never designed it to be done and therefore may not have figured that into their equations and design.
Most of us vintage yanmar enthusiasts will tell you no and never. Sometimes you will get another forum member or one of even the Yanmar guys say they do it and have for ten years or whatever. But what is not known is what increased wear has occured, when will a failure result of any vs when or if one occured in the proper stance. Just my opinion.
Hard on the bearings and may snap the spindles. Some have done it and got away with no problems. Then also if you have a FEL. and swap the front it will or may
hit the FEL.. I believe Hoye Doesn't recommend it......
So... Leave the front wheels as is. Got it.
I assume that it's OK to leave the rear wheels like they are in the picture? I assume it's been that way for some time.