Mel,
I have a 1712, which in the simplest form is a yellow and white 782, with the front hydraulic ports as standard equipment. The 1712 model was built in 1985 only.
When I bought my 1712, it came with a 54" power angle blade.
This summer I put the tractor and blade to work.
I made/built a 24' in diameter fire ring area in my back yard. Since we had to cut it about 12" into the slope leading down to the creek, we first tilled the area with my 1450, and then pushed the loose dirt to the 'low side', and repeated the process.
Please disregard the date in the corner of the pics, it is incorrect.
I put 23-10.5-12 Carlisle Super Lugs on the rear, and in the pics it has 4 sets of IH weights bolted on. The clay was -super hard-, and when the blade would catch a high spot, and dig in, the tractor would break the tires loose. However when the dirt was already loosened by the tiller, then the 1712 had no problem.