I adapted a State Highway angling plow over to mine. I did not have any problems with tweaked frame, etc. in 15 years of using it. You will have weight lifter's arms after steering it for a long time! Use low range, and I would highly recommend getting the engine oil out of the transmission and going to Dexron. I did this to mine at the recommendation of an automatic trans shop owner who had worked on them in the army and build the civilian version for racing. I never had a transmission problem for the whole time I owned the truck. I used it for grain and stone hauling, snow plowing, and pulling an implement trailer. It was worked hard with good sense, not abused. I could plow in high range third "hilly" on the quadrant on the roads when I got the speed up. Looking back, I would now put a plow on an M35 since I have experienced the extra power available with them. The automatic is nice, though. Keep the oil cooler on the trans cleaned out, Drain the coolant at the trans, remove the front cover on the trans pan, wash it out, and replace. Also keep the band adjustment at the top front of the valve body boss on the side of the trans at the right setting.
Regards Marti