However on a 4420 the ladder stuck out like the hundred series. i know this because i have ran a 4420 with a 443, we had to fold the ladder up. the 7720 i didnt think had steps hanging over the tire. i thought they came down the back side of the tire. i think it will work but its gonna be tight.
i would say buy u a good 6 row because espectiallyif you have hills the combine will want to fall off the rows and i would say u would run over the next row
ran a 4 row for many years on a 6600 and was moving at a pretty good clip across the field and was very tight on the rows have to watch real closely wat you were doing so you didnt run over the row. run a 6 row now and wouldnt go back