Super AV Steering Arm Fit 140?

Second question: Has anyone tried straightening a steering arm? It looks like putting heat on the shaft and twisting with a wrench would work, but it is a cast part and, as we all know, messing with castings can be trouble.

Speaking of bending castings, this tractor also has a bent front left cultivator lift arm (the piece that reaches vertically upwards from the cultivator implement bar and connects to the rod coming from the rocker shaft. Standing sideways the piece in question is pretty much in line with the generator when the lift is up.) It is hard to figure how that arm got bent outward. Maybe the tractor was laying over in a ditch and they hooked a chain to this bar. At any rate, this is a bigger casting arm piece to heat-
up and bend. I'm going to do it sometime, but wonder if the heating and bending will change the part's strength. I guess in the worst case, if it bends again, we can stiffen the piece by welding on channel iron. Ever see cultivator linkage get bent outward?

You can tell by grinding lightly. Get a piece of steel and an old piece of cast iron like an engine block to learn the difference in the sparks they throw. I could describe it but you have to see them yourself to really know the difference. (Cast iron is more red and does not sparkle much)