HI Kent. adding weight to tractors can sometimes be a bother. any time you can add it directly to the rear wheels either by bolting to the rims in the case of small fords like the 8n on the axle stubs like on John Deere or adding liquid in the tires puts the weight to better use than just hanging it off the frame the rear end or the draw bar. since having the weight rotating with the tires means it adds to the kinetic energy having it static mounted while it adds downward force on the tires to help the lugs bite in the soil, it really is dead weight by being more resting mass that has to be set in motion..
Talking about skid steers. I have an older Toro Z master 60" lawn mower with a 23 Hp Kubota diesel that I just got the engine running on I am planning on removing the mower deck relocating the drive wheels about 18" further back on the frame then making a crawler undercarriage for it. Then make the loader arm assembly with a quick plate to accept modern skid steer attachments. this will make the machine just a little smaller than the current Bobcat T110 track steer or similar in size to your machine but on tracks since I will not be using the PTO to drive the mower I will mount a 2nd hydraulic pump there for the power to the loader or attachments. I also have a 72" hydraulic flail mower I plan on adding the attach plate on then I will be able to use it on my Frankenstein loader