Here is away you can use the pole you have. I well try and make this as short as I can with pictures.
!st you have to have a hookup on the loader top as in pictures 1 & 2. Note one is welded on and the other one is bolt on, and the bottom part of it butts up under the lip. The part on the bucket has to be higher and a little fwd then what even size brace you use from bucket to pole.
#3,4, and 5 Weld a 3/8" or 1/2" X 2" on a peace of angle iron that well over laps the cutting edge of the bucket.
Then drill a 1/2" hole in the flat stock and bucket as far back as you can on the flat stock. I use a wing nut to hold it from coming out.
#6 and 7 is a weld on cat 1 ball assy. Part # on it was 011915 and I think I got from Agri supply. They have to be spaced so you can put one side in and just to be able to get the other side in. You can put spacers on the out side if you want to keep it from moving sideways before you pin it. You can also use a short pin on one side and a long one on the other side, that would give you more between the ball lower link assy.
NOTE. DO NOT USE A CHAIN FROM TOP OF BUCKET TO POLE.....YOU WELL GET BOUNCING AND CHAIN COULD COME UNHOOKED.
You end up with a angle iron and one bolt to put on before the pole. real easy and have done this way for 40 years. Different steel size for loads