Emissions on my Slant

You need a service manual. Unfortunately, nothing newer than 73 is available "free" at MyMopar.com

You will have to either round up an old original, a paper reprint, or one of the outfits selling digitized ones.

However, there should at least (unless obliterated, repainted, removed) be an underhood sticker with the hose diagram

One VERY important tube/ connection/ hose you want to deal with is the one coming from the fuel tank, to the engine bay, WHICH IS THE tank VENT. Identify it, and if you don't get the vacuum / etc reconnected, make certain that that tube is "high" (not bent down) and open in the engine bay