Exhaust swap from 4 door to 2 door...

Off topic byt I feel the importance. My kids drove old mopars too. Today they have kids of their own.
I have to suggest some aftermarket seatbelts for jumior and his passenger
( girlfriend ). The seperate shoulder belt from the factory is a crock and never gets both worn and stored.
The belts you want are the conversion van type. They have a drop loop from the roof making them more comfortable at the shoulder.
Here's another tip... whether you pay for them or junior pays for them, make junior install them. The more effort he puts into seatbelts the more
adament he will be about buckling up himself and his passengers.
From the heart with the voice of experience. Happy moparing