Getting rid of torque converter putting in sprocket. need help!!

[Kstew25]

I have an EZGO txt and I'm doing an engine swap putting in a Kawasaki 350 motorcycle engine. Problem is I have to remove the part of the torque converter on the rear axle and put in a sprocket. The shaft coming out of the rear axle is splined need help figuring out a way to get a sprocket to mount to it. I was looking for splined sprocket hubs that are pretty heavy duty because this engine has got massive amounts of power for a golf cart and don't need the sprocket to break or strip the shaft of the axle. It's a motorcycle engine so it doesn't have a reverse gear that's the reason behind staying with the golf cart axle and not going to a live axle. The golf cart axle has a forward or reverse lever and I need to keep that.