New Thread-to Be Or Not To Be?

Keep it “original” as much as possible with these exceptions that might improve the car's utility or performance.
Number one. Mopar engineered upgrades are good.
Example: factory front disk swaps or Mopar factory four-barrel intake.
The bottom line here is I like to see Mopar parts on a Mopar. Even if they came off a later model. But that’s me. As we all know, it’s your car.

Number two. Do what is necessary to save the car. If a part is not reproduced or otherwise available to you, substituted whatever works. I saw a rough 68 Mustang coup on a trailer this weekend. Where’s the challenge there? Just open the wallet and catalog.

You mentioned the "collector value"?
That is another discussion which depends on one's perspective.
Is someone in it for the money or the hobby?
What was that movie? Attack of the Clones?
Would a rose by any other name smell as sweet?