Why not get two motor mounts with the same fire wall hole pattern--put a hot 60 on one & a good 91 FS on the other. Try both--see which one you like--can't be all that hard to switch out motors . Just make sure you re-balance. I bought a slighty used TT 61 for $50.00 ,so there are bargins out there. There is a ton of engines in the Market place forum in RCU --check em out --Good Luck ---