So if we have something bad to say, we shouldn't say it?
To be honest, you're going to want to try and enjoy the car for what it is. I think some of your ideas are valid, but some are just, well, odd? What is the purpose of having two moonroofs? You realize that if the first one opens up "spoiler style", that will block any and all air from entering the rear moonroof?
I really don't know what you're talking about with the neons, and needing separate boxes. In my opinion, and yes I'm saying OPINION, neons are adolescent mods that show no real character or thought. To me, it just says that the owner couldn't afford anything but a $20 mod, and they chose the worst option that they could.
Built in radar detector? I could be wrong, but I believe they need to have 360 degrees of "vision" to detect radar?
HUD - This has been asked before. It'll be a LOT of work and a LOT of money. One person states that you'll need to buy a whole different windshield, as there is a special coating that they put on the inside of the GP/Vettes for the HUD to reflect. Not to mention, getting the HUD unit to match the Contours RPM/Speed.
All in all, your best bet is to go with an a-pillar gauge pod and some nice gauges. Do any/all of your interior lighting in the color of your choice(red in your case). Do the short shifter, and any other little interior mods that you like, and save for maintenance issues that will probably arise.
Not to tell you how to spend your money, but you'd be better off learning the value of a dollar by paying your Father back for the car. You'll thank yourself down the road.
Good luck with the car!
Mark