I have that same blade for my 45 loaders, never used it , just sits in the barn. This set up is about my third or fourth option for snow removal. Never got past the garden tractor with three way blade this year. Nice set up, thanks for posting.
What a beauty. I have a 45w on my 520. I used my manure bucket to dig a shallow hole to bury a bunch of fist sized rocks but i ended shearing off my left lift pivot bolt so i quickly replaced it so i could get back to work
I own a 1955 Model 60, came with our property. It had sat for 25+ years before I got it. Fluids and carb rebuild and it fired right up. I use it to plow/disc and plant/dig spuds now.
3 point was an option, order with the tractor or purchased later through the dealer. The #800 or 801, 3 point attachment could be used on a JD A, B, 50,60 or 70 with the "rockshafts" or the square shafts he was pointing out.
The 800 or 801 will fit a G, but the you will need the hydraulics, preferably a PowerTrol. The better hydraulics and 3 point came with the 20 and 30 series tractors (720 &730's)