A heavy steel structure bolted to the axles may offer some protection, but could give a false sense of security. Modern tractors are designed to withstand the forces that would be transmitted through the ROPS. The axle assembly on an older tractor may not take that kind of loading. Also remember that older tractors are significantly heavier than modern ones. Where to mount the seatbelt is another potential problem. The seatbelt needs to be rigidly mounted to the something that will not move or tear off under the load of the driver. The pan seats of these tractors are not rigidly mounted and would not hold the driver in place in the event of a roll over. Here a couple safety tips that will help avoid roll overs. The wider the rear wheels are set, the more stable the tractor becomes. Don't operate the tractor on hills with only one rear tire loaded. Don't pull with implements hitched above the rear axle. Don't drive up or across steep hills. One question you should ask yourself is: What am I doing with the tractor to make a roll bar necessary? When operated safely it is nearly impossible to roll a tractor over. After all, your SC has probably made it the last 50 years without a roll over. I am by no means the oldest one on this message board, but I have never had an accident with a tractor and I was driving solo on narrow front tractors by the age of 10. Good luck with your project. Antique tractors can be a lot of fun as long and you remember that all power equipment is dangerous when not treated with enough respect.
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