crash-harris, welcome to OCC. I bought the same model thrower last summer and have it on a 1650. It came with one of these hubs and solid steel pulley;
http://www.surpluscenter.com/Pulleys...-Pulleys-Hubs/
The large hub has a key way and has lots of clamping area on the shaft. When I got the thrower it came with a B series belt, which I believe is 5/8”. Now I thought the quietlines used a ½” belt, but…
the supplied belt seemed to fit well in both pulleys except it was to long. I asked the guy at the belt store for a 30” belt and he gave me a Gates B29 (said it was 30”). Used it yesterday and it worked well.
So, I would say defiantly no stamped pulleys. You need some weight and or at least some chains. I think you could plow better with the front blade vs having the weight of the thrower on the front end with no chains or weight.
Good luck