When You really study that 656 Hydro it really is kinda a funny tractor. I didn't see it @ RPRU, Son & I spent too much time looking at the BIG iron or letter series.
I agree with Marlin, that Fast-Hitch looks like something that should be on a 404, not a 656. The F-H on Dad's old 450 was twice as beefy as that hitch.
White wheels were only used on some International Utility tractors built at FARMALL and of course the 1206. And like everything else IHC, clam shell fenders from a 460/560 would have been available until the Flat tops were offered and became more popular and then the clam shells would have been discontinued.
Marlin's also correct, this is a later model 656 built after the 756/856's were released because of the bar grill, the early 656's had a white painted perforated metal corrogated grill screen like the 706's.
It's actually a rather well-optioned tractor, diesel (saddly a D-282, never destined to ever be one of the Ten Best diesel engines ever built!) Hydro, Fast-Hitch. Would have been a nice picker tractor or cultivating tractor with a 4-row frt mount cultivator. Both mounted pickers and frt mount cultivators were still popular in some areas of the mid-west in the late '60's. However, for a mounted picker I would have chosen a 706, no Hydro available but more transmission speeds than a 656 gear drive, same D-282 engine but a bit more HP, and the whole frame & rear end was MUCH beefier. Every fall We'd hear about someone breaking an axle on M's, SM, SM-TA, 400/450/460/560's. Those 2-3/4" dia axles would actually bend from the 3000+ pound weight of the picker like a 2M-E, 2M-H, 2M-HD, and later the 234 pickers. Add the optional sheller or grinder attachment to a picker and the weight is even higher.