@TheOldHokie , wouldn't I be better off with the 5cu motor instead of a smaller one? If my calculations are right, with 2.2cu and 8.5GPM (my tractor), I get 892 RPM. With the gear it goes downnto 2.8 round per seconds.
The 5cu motor with the same GPM would yield a rpm of 392 wich is much more...