Different size torque converter knob 170 vs 225?!? Are you kidding me?

You're in kind of a tough spot. The only transmission that would be a drop-in and make this swap work would be '66-'67, and those are not at all common any more. The early crank counterbore can be enlarged (machined) to accept the later torque converter, but that involves an engine teardown. If you don't want to go shopping for another get-by engine, better dry-dock this car til its 225 is built.