We used to have a 260 horse pawnee, it was a brute.
My father used to tow with a 67 Turbo 210. He had more than one guy bail when the gear started heading into the wells.
We also used to tow our 1-26 with a 150 hp Stinson 108. Not a great towplane, but you can kill the engine and thermal with a 1-26 on a decent day.