I've seen pics of a front mounted FL on a Sears. It was powered by an electric motor at the rear of the tractor mounted on the ballast box.
I owned a Bolens 1886 with a front mounted FL. It appeared to be the same setup as the pics of the Sears one, other than having a PTO powered hydraulic pump.
Here's a link to a video I made of it when I first got it.https://www.youtube.com/watch?v=Y5FLOzvJNnU
Here are some pics of it after I had it refurbished and two pics of the sears one.