Luckily,71-78 B body wagons did not change much in the of interiors,so the headliner boards should be an esay find and may only need to be painted to match.
The bumper is 71,72,73 only since the 74 up was changed to meet federally mandated crash tests.Both Dodge and Plymouth used the same bumper.
I do not know where to get weatherstripping since I bought my car the way you see it here.
In the past,I had good luck with Restoration Specialties for oddball weatherstripping.
http://www.restorationspecialties.com/
The hood..hammer and dolly or start searching for one from a 71 to 74 Satellite sedan or wagon.If you grab one,you can either stuff it in the back orr tie it down on the roof rack!!!,LOL!!
I found out the rear quarter panel side molding is wagon only.I did grab the moldingss from the sedan posted in my pic.Too short.
However,from the fenders to the back doors the rest interchanges.
They do come up NOS once in a blue moon.
There are three different styles,1)narrow with vinyl,2)wide with vinyl,3) wide no vinyl.
I already bought some NOS and one piece for the front fender is #2 and no good to me.
Yours appear to be #1 narrow with vinyl.
So be careful searching for that schtuff.
I would like to invite you to check out a wagon forum that will be very helpful to you.
It almost has a cult following.
There are members over there that have Mopar wagons.
http://www.stationwagonforums.com/forums/index.php