I tried putting my Rhino blade on my FEL years ago. Built the angle frame & pivot, etc. Frankly it didn't work worth a darn. My drive is rutty gravel on a hill. The blade ended up so far in front that the geometry was never right. The blade was way too high one minute, digging in the next. As you raised and lowered it the angle from horizontal changed, leaving one side high and the other digging.
If you have a level driveway, you might get away with it. You will need the extra hydraulic control for the angle. Just pick up a control valve and put it in series with the dual control you have for the FEL. Mounting it is up to you.
I just put a hydraulic ram on my Rhino rear blade. I can swing it to either side and control the blade angle with my rear remote. When plowing snow, I have a guage wheel that keeps the blade up an inch. Since the blade is level, turning it doesn't cause problems.
