I use a 60" Buhler Farm King snowblower on the back of my TC24. I have only used it for one season so far, but the tractor had no trouble handling heavy snow, I would say that while I had some heavy & wet conditions, we did not have a really heavy snow year and most of the snows were under 5" and the drifts were no more than 15" deep.
The only problem I had was weight, the blower is heavy and it made the front end of the TC24 light. I solved that by putting 100# of wheel weights on the front wheels of the tractor. (I used EZ Weights, there are photos in my gallery on the PHOTO page of TBN). I do not use the FEL when I have the blower on the rear end, but the FEL would easily provide more than enough counter weight to offset the weight of the blower.
I believe NH offers a 63" front blower for the TC24, I figure if the manufacturer can recommend a 63" blower for the machine, then the 60" blower is right in line with what the tractor can handle without bogging down the engine or causing other undue stress.