I read if the car was equipped with a factory high performance engine it also got the black grille and tail panel.
My car is a non R/T with a 340 and it is black in both places.
There is a post on the FBBO site you should look at.
Vapor Separator is the title posted by Charger Fan.
The diagram and explanation posted by Vaanth will help you for sure.
I wouldn't worry about the liquid fuel return. The car never had it originally and fuel vapor lock does not seem to be one of your issues.
I would concentrate on the fuel tank venting side of things.
Just to clarify.
The three lines I mention are hard pipe lines that run under the car from the engine bay to the rear of the car - not a 3 nipple fuel sender/pickup.
Your sender is likely to have been only one pipe originally and if the tank does not have the 4 vent nipples it is also wrong...
The pipe on the fuel sender/pickup is for liquid fuel to return to the fuel tank and has a separate line running back down the car.
These cars had 3 lines fitted at the factory. 1 for fuel to the pump, 1 liquid return line and 1 for the tank vent system.
As your car is 1972 and the high...
That is the standard dash switch plate.
Performance Car Graphics has the new plates - or they did?
Set the switch plate up flat and soak the decal plate in turpentine over night to break down the glue.
I just levered my one up with a toothpick.
Fix the new one on with Elmers rubber cement.
I don't believe plastic and pop rivets play well together. The rivet expands while being fitted and can crack the plastic - either when fitted or over time.
There is nothing like the sound of a V8 powered car going up through the gears of a manual transmission - even when being driven gently.
That is the appeal for me.
If you are getting liquid fuel up that line something is wrong.
A smell of fuel in the engine bay wafting out of the open line is one thing but not raw or liquid fuel.
No I don't think so.
The PCV will create a slight depression in the tank that should deal with any vapours created by evaporating/expanding fuel.
After all the engine is gulping the same dirty fuel vapours via the carburettor and fuel pump.
What vaporises off the fuel will be free of particulate...