Leave it alone, unless you are going to go allout and spend a wad,,seems like you already have what you are striving for,,good luck,rd

you are going to get a lot of different opinions on this subject and the bottom line to all of them is "What do you want from a show"  Are going there to bring home the hardware or are you going to share in the spirit and mingle.
I personal do not like car shows, just not my thing to sit around and wait for some to approve of my ride, to pick it apart, to feel like i have to "brown nose" the detailing, all of the little momentos and auto lit, trying to increase my standingin the judging.  I like, no i love to drive my vette, not sit behind it wanting for people to tell me "nice looking vette" and for me to nod in agreement.  I will go to shows and put up with all of the hype of one to be with my C3VR family, thats about the only reason, so good luck to you what ever you decide, i know there are people here that differ greatly from my point of view, and that is what makes this site family.
Larry

Original! I like 'em just the way that they are.

I would leave as is.  What I have noticed at car shows, is the the lack of detail and cleanness under the hood.  Some people do not even like to open the hood. I always like to look at the engine and I imagine the judges do to.   Just my 2 bits worth...

It really depends on what kind of show it is. The real serious, technical ones will be looking for original parts and showroom clean.

"Local" car shows will not be kind to s "Survivor" type car...not enough flash. That is, unless it is a really rare car, or that sort.
I do NOT like "judged" local shows. I much prefer participant voting. Most of the time, the club putting on the show judges the cars, and if you're not in their club, you ain't gotta prayer.
NCRS/Bloomington is a whole different ball-game. We prefer un-molested originals. Paint got some crazing in it? That's called "character". Got a bit of rust on the exhaust? "Patina"...
To each his/her own! Do what makes you happy with your car. Put it in a couple of local shows, and see how it goes. Ya just never can tell.
My first year of showing the '74, before it was even fully detailed, I won 1st or 2nd place at 11 of the 12 shows we hit. Next year, it was the same. Now...the car won't win for crap! It still looks just as good, and even better, but that's not what folks want to see...
If it had a Jimmy hanging out of the hood tho, there'd be no stopping me!

the shows i like going to are the ones that are not judged. you bring your car to show it off and that's it. you hang out for a couple hours and bs with people and then go home-- happy most times as people admire your car and most times compliment you on it. if something needs to be replaced it gets replaced but i am not trying to make them picture perfect as i want to drive them all over and enjoy them. just  my thoughts.