Will do, Smitty helped me out a lot.
I have also been using some parts off 430, 425 and motor mounts off a Jd rear engine model, can't think of it. I first started this repower with the intent to use a d1105 out of a Turfcat I had, but found my l3e. I'm way excited to find out how well it pulls. My only concern is that the engine to the tranny has been upgraded. I'd like to work on hone rear end to beef it up, but money talks and so does time.
So, with your return fuel line, did your kubota have a return loop for the fuel? I have one on the l3e, but closed it, so I have no return line other than it returning to the fuel rail.
I think you'll want that fuel return line to run back to your tank--it can cause problems otherwise. Just use 1/4 inch fuel hose...and drill a small hole at the top of the tank a little smaller than a barbed fitting --straight or elbow as needed. Sand the area around the hole, force the fitting in, and use Hi Temp hot glue all around it to help hold it in place. Putting the hole in the center of the tank will reduce the possibility of leaks due to sloshing fuel.