STEVE - I tried counting rolling coulters in the one pic, one must have been hiding! Seven bottoms would make more sense, 4010 is good for four, 88 OLiver would play with three. Back in that era there really wasn't a seven bottom tractor, except something like the 8010/8020 JD & 4100 or 4300 IH.
The BTO that farmed the 320 acres across the road from our house for a couple years had a 1206, but all I ever saw him do with it was disk in weed killer with a 24 ft disk, he never plowed the 320 with it so I don't know if he pulled 6 or 7 bottoms.
The spring of '68, That BTO traded MY Super H at the IH dealer for a new 756 w/Nuess diesel, and either the week before or after bought a 4020 WFE, factory cab, and Power Shift. He'd only used the Super H to pull a brand new IH 4 row corn planter similar to the one you showed hooked to the 504, the spring of '55. in '56 he bought a brand new 300 to pull it, needed the T/A for some hills!
Anyhow, spring of '68 he plowed that 320 with the 756 & 4020 both pulling IH #60 or #70 4-14 plows. They plowed in circles, not lands, so had to round off the corners every couple rounds. The 756 was so much faster with it's plow than the 4020 that he rounded the corners off, then would set sail and would catch the 4020 in 4-5 rounds and start rounding corners again. He pulled a new IH 6-row planter with the 756, then cultivated the corn 2-3 times with a frt mounted cultivator similar to the one you showed on the 560. We saw that 756 a LOT that summer.
Unfortunately, that 4020-D w/power shift was the first of MANY green tractors on that farm. Not sure what ever happened to the 756, but a HS buddy of mine has bought & restored the 1206 and it sits in his shop most of the time, but I understand he does get it out to stretch it's muscles occasionally.
BILL J. - You need to take a road trip! Down by Steve B's farm, the ONLY hills are from the Interstate Overpasses. There will be some freindly little hills, but nothing that would tip a tractor over. About 100 miles north of Steve's farm we had more and bigger hills, on the 80 the Folk's own, there's one hill on the very back by the creek that I would NOT want to run along the length of that hill, only up or down the hill. You get 3-4 miles away from that farm and either the ground gets really flat, or even hillier. But for the most part it's ALL farmed, corn & beans. 30-40 yrs ago there used to be a lot of farmers raising hogs, they're almost all gone now. My Mom's tenant for the 80 acres custom feeds 4800 head of hogs a year in a brand new confinment system. Biggest year Dad ever had was farrowing & raising 800 head of hogs, plus 40-50 head of cattle. We eat a LOT of pork in our family.