The curved bars came out when the 82 series arrived like old skull said, but they should still work fine with your machine. Orient them like a smile, like in the first pic. They don't lift very high 2-3" maybe. I see your using a chain for lift, maybe choke up one link if it still lets the blower drop below the wheels for terrain variation. A check to see if you have enough slack is to put 2"x4"'s under the wheels to raise the tractor up, the thrower should still be on the ground.
Bill
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