our  1955 handles a  15ft  notill drill  very easily...   I run in 5th gear and in  direct drive---  when I can sit in the seat. 

but I will go with  CHris on the 2-135    that cab will be valuable too!
I didnt  think so  5yrs ago..  and  3 yrs back put the drill on a  2805  massey just to get the cab!  (then its AC went on the fritzz)