You did spot a real problem bringing up weight distribution.
At the moment I have a bushhog on that three point and have been going up and down steep hills with that with no front weight. I have learned several things which means I need more weight up front. And that I need to get rid of the huge iron rear weights, and perhaps even drain the salt water from the rear tires.
When I started this project there was an awful scrap metal thing, kind of sort of like a front end loader wrapped around the tractor. That's why it has too much rear weight, and no front end weight. I got rid of that junk loader thing right away. That useless loader attachment didn't have cylinders with safety valves, if a hose were to burst, the whole mess of it would come crashing down.
So far I have found that I can lightly touch a wheel break and before I hardly know it it will spin the whole tractor around. All the way around a 360 very fast. I have also found that if I get a bit too close to a tree with it, and if the rear tire brushes up against a tree a bit, instead of it just brushing a bit of bark off of the tree like normally would happen, it wraps around the tree walking that tree between the inside of the rear tire and the running board. That scratched the running board, dented it as well, and that wasn't worst of it. The tree I brushed up against was on the clutch side, I pushed the clutch in and had it down, but the clutch pedal sicks out a bit longer than the running board is wide even without it being dented in a bit.
I got it stopped, but when I tried to back away from the tree the end of the clutch pedal was embedded about an inch into the tree, wouldn't move. I had to get off, dig out a screwdriver to use as a wood chisel to free up the clutch. Then I was able to back it away, unwinding it from the tree.
No I'm not going to have that kind of thing happening when I tow the other tractor with it. What I will do is add the 8N's front weight to the 600 and then unbolt other parts of the 8N as needed to remove even more weight from the 8N's front end I have lifted off the ground until I feel it's safe.