i found a 56 tooth cast iron farm machinery sprocket. its 11 1/4 wide, it had about 1/32 of an inch clearance with a chain on it. so im sure the 55 tooth one will fit. so doug, the design doesnt really matter. i like the spade design. whatever is easiest for you, and will get me the sprocket the quickest
just let me know when you need the money.