nice. I hope the 1717 clears the center driveline on my Muggy as I've ordered this motor last wednesday!
If the motor is on the right side (RCM mount), then it will hit the chassis brace first. A 9 tooth is about as small as I can go with a finned neu @ 44mm, at 55.6mm you will likely have to run a big pinion, about 20 teeth.