I preserve mine by driving it on an almost daily basis, it chirps the tires going into third even at like 1/8 throttle. I was taking a co-worker home after work today. He asked me if something was wrong with my car because it shifts so hard and it seemed to chirp the tires almost every time going into third gear if we were on a smooth road. I wasn't even building boost. I told him I bought a special valvebody for the transmission. He was like "you paid money to make it do that?" He probably thought my tranny was going out but he is probably used to normal granny shifting gear lagging automatics.
I tinted the windows to cut down on the sun that made my dash get a crack and the top of my back seat is getting pretty hard. I am going to put leather conditioner on it and see if it helps. Other wise I'll have to get the seats re-done at an upholstery shop in a year or two.
I'm getting ready to paint it, and I'm going to switch to the newer style trim and remove the pinstripe on my car.
Then I'm going to lower it.
I'm not one of those guys who buys a car to leave it stock. Nor am I an enthusiast who buys a specialty car and leaves it stock. I drive my car, I modify it, and I plan to restomod (restore and modify) it. When I get done (which will be never) the car will look like a new car, handle like its on rails, and outrun cars that cost far more than this one.
I enjoy a nicely preserved specialty car, don't get me wrong, but I couldn't do it. Whether it be a 69 Charger, an 87 Buick Grand National, an SC, or a 1963 Split-window Vette, I'd have to modify it. Nothing comes from the factory that I'm happy with. The factory just gives me a good starting point. I improve on the car from there on out.
Oh and I'm at 238k miles so yes my car gets driven. It gets the oil and filter replaced at 3000 miles like clock work, and I always use premium fuel. I check the brakes once a month, keep a good set of tires on it, change the antifreeze every 6 months, wash it twice a week, wax it once a month, change the trans fluid once a year, change the belts every two years... plus if I notice anything that might be a failure coming up I replace it asap.