How do you fix this?

The problem appears to be pretty simple. It looks like you have a Supershifter 2 shifter. Does this shifter have the reverse lockout? Then it might be a later one. It is not a Mopar shifter. Also that bracket looks to be wrong. It shouldn't be that thick.
Supershifter 2 and the Street Supershifter have the 1/2, and 3/4 rods STRAIGHT, so some modification is required to mount certain shifters in different applications. I like to redo old race cars, so I've seen alot worse than what you have there. Just get a correct Mopar Competition Plus shifter, and a new cross member. For a "nice cruiser", you should be OK.