As luck would have it, the driver's side is in top bin in storage, but passenger's side is hiding. The upper arms are there, the sway bar, etc, etc just not what we're looking for (It is there, just between work and honey-do list, I haven't had time to move the top bin aside to get at the bottom one).
I see it was just paint that was cracked, not frame, so I am slight less concerned. (For the record, I still think swapping the front frame section in the proper solution).
Ranger frame is 1/8" thick, roughly 6" tall (plus some horizontal flanges) and made of 30 ksi steel. So, you will need north of 15 tons (probably more than 20) to straighten that kink. And you need to keep force localized - you don't want to flatten the hump over the rear axle instead of straightening this damage. Heat wrench can be of assistance, but comes with risk.
The issue with using rubber tired vehicles - the tires flex.
The TD20 bulldozer was much easier to do a smooth job with than the 4020. With the JD, you would lower the blade to take just a skim coat, then the tires would flex and you would be taking 3", you would lift a little and the tires would unload and blade would be in the air. With the bulldozer, there was very little flex.
With the bulldozer, it rocks like at titter totter over any hill, so you need to be aware of how it is balancing to avoid making hills and valleys, but at least you aren't fighting tire flex too.
The same would happen if you are trying to use vehicles to straighten - because the tires flex, it is
very difficult to get a precise controlled pull. You don't want to over do it.