Several things, my friend. Currently, I'm building a luggage trailer for Otis -- it's a reproduction of a 1930's era Mullins trailer, but I'm going to jazz it up a bit (well, a lot), with stand-alone stereo equipment, and a few things to allow us to cook some things, mix some drinks, and serve some wine -- more than just a luggage carrier, in other words. The ultimate party trailer for Otis (who, after all, likes a good party, being orange and all).
Second, I've been working on a 1953 Dodge Pickup, for about 3 years. Way cool body style; much more interesting (to me) than the been-there, done-that F-100 or '56 Chevy 1/2 ton PUs. We're down to the body work, including custom fabrication of a new pickup bed. The truck will be a challenge for sound, since I'm leaving it at 6 volts (for now). My preference is to restore the old radio (I have it -- a lucky find) and see how it sounds. If it sounds like crap (likely), I'll have to figure out some way to bracket up a 12-volt source to the old flathead motor (I don't want to convert overall to 12-volt, since I'd have to swap out too much, including the vintage gauges).
Third, I'm trying to solve the sound problems in two vehicles -- my F-350, which is simply a noisy beast (and has a regular cab, meaning tight quarters for a good sound stage), and my E-30 -- that system is overly complicated, and I'm trying to simplify it a bit (too many Optima batteries are causing the voltage to waiver, so that my headlights flicker -- among other problems). Then there's Izzy, the Isetta. I've been threatened with bodily harm if I put a custom stereo in the Isetta -- but hey, that's kinda my trademark. Give me a car, and I just have to put a stereo in it. Izzy has a long way to go before he will even run, so I have some time to plan the system -- and I have some neat ideas for Izzy -- more surprises in store, mostly just to p'o the purists (JK)!
Finally, to address your point directly, my dream ride is a '33 Ford full-fendered rod. I've been searching for a good resto candidate. The problem -- prices on the real steel ones have skyrocketed. Even if you do find one in decent shape, there's a feeding frenzy over it -- and the prices just keep heading up. It's very easy to push six figures on buying or building one, and that's just outrageous. But one day, I'm going to do one from the ground up -- maybe with help of a Fat Man chassis, some Mustang suspension, and engine from www.enginefactory.com, chop it and slam it and shave it, etc. etc. etc. My wife loves the look of them; I'm partial to the Lincoln Zephyr, myself, but she says no, the '33 Ford is more classic. That, it is -- very popular over here with the street rod crowd.
So, I have a lot of projects, and even more dreams in the works. Dangerous addictions. But in each car, I insist on one thing -- a good stereo. Granted, on a few cars (Otis, and the E-30), I've gone a bit overboard, but we all live and learn. And, it's all good fun.
Good luck with your stereo -- email me offline with any questions at davidbowen5828 at comcast dot net.