We run a stock R-62 with a 30' flex head and a 6 row corn head. I think it has more than enough power and capacity for a 8 row, may loose a little ground spead. But like one custom cutter I know says that you can never make up for width with ground speed. As for the 30' head there are time that I feel a little underpowered but most of the time we don't have any problems with that either.