How Do I Fix This

I would just get a port a power and a length of 2x4 and jack the narrow side out to match.

Riiighht. He’d blow all the paint off his quarter if he tried to go more than a 1/2”.

These cars have some pretty loose tolerances. But a side-to-side difference of 1.25” isn’t normal, it’s double anything vaguely normal. He needs to figure out what’s going on before he shadetree’s this onto a frame rack.

Yes sir, I agree. I'll put her on the lift tomorrow and get some measurements.

Definitely. If you haven’t downloaded the FSM you can get it from mymopar.com, they have the chassis measurements so you can check your frame rails too.