I think that may still be to big for your tractor
I would go with a 9' New Holland or similiar
How much do you need to mow?
I did a seach on the net and found a new holland page that says it needs 60 hp to run and weight is approx 4800 lbs. I cut around 160 acres. In 2 more years I should be up to 320/400 acres to cut.
Todder