Front mounted belt pulleys went oput with the 880 tractor. Now a good 880 will give you a 40% increase in power. Dad used to have a swa mill. Used a 20-40 Oil Pull which is about like your 60 (40 Horse) He went a 25-50 Baker which was a little under rated but would compare to an 880 (60 horse plus) That ended the problem. How large a blade do you have? I don't remember if they used a 56 inch or a 60 inch saw. Larger and later Oliver's had a belt pulley driven off the PTO. You just don't find them laying around. You are not that far from me. I used to work at Ottawa Lake. J.