No need to get all fancy on me with bolded print or itemized info, just show me a car and why you think people are gonna regret not keeping them. My theory is, with 3-D Printing becoming easier and cheaper by the day and the aftermarket getting ever more clever, at some point we're just gonna throw out the rulebook on what old car was cool or not and just start making every old car we can get as insane as possible. That being, my focus is on cars that have good basic attributes, decent looks, great potential, and some existing aftermmarket.
First off, any 1990s Pontiac Grand Prix Coupe is guaranteed money.
They look good(I mean, for 90's cars), they're from an extinct brand which just sounds good, the later ones are wider/roomier than the Firebirds from the same era WITH LESS FRONT OVERHANG(There's like a foot of unnecessary bumper on every F-body and it pisses me off), the GM L-Series V-6 has an endless aftermarket, and if you have some money to blow you can make it AWD with parts from almost any GM sedan or SUV. I would say the same about any W-Body coupe, up to and including the last Monte Carlo, but something about those GTPs gets me every time.
Next, I'd nominate the poor odd duck we call the Chrysler Pacifica. I'm not sure about this one, but I think I can justify it somewhat.
A great looking, comfortable, usually well-equipped crossover/wagon/SUV thingy that sadly lacks two things: Balls. There's a good aftermarket for cosmetic parts, but not much going on the performance side-which doesn't mean it doesn't have any potential. Having worked on a few of these, the car has a nice, big engine bay, almost too much for the engine if it wasn't cluttered to hell in typical Chrysler fashion. If you sat and thought it out, you could definitely fit a Hemi, trans, and driveshaft in there, especially if you find an AWD model. I'd suggest finding a semi-wrecked Grand Cherokee from 2005-'10 and keeping very careful notes, but you'll have a truck like no other when you're done. If not, just swag it out, drop it down(it wasn't going anywhere offroad anyways) and ride slow, so everybody sees you.
Next up, it's the motherfuckin' Ford Probe.
Arguably the best looking compact America gave us in the 90's, I've always had a soft spot for the Probe despite my misgivings for anything FWD and/or small. It's lightish, athleticish, and strongish with the available V-6, but it was never a performance superstar and I blame the overabundance of window, which couldn't be good for the center of gravity or weight. The thing is, nowadays we have plastics that have the same clarity/structural integrity of glass with much less weight, and the added advantage of them being shatterproof-but that's not why it's on the list, no. That would be the V-6.
I've been toying around with some blueprints in AutoCad for a long time, and one thing I've noticed about a LOT of FWD coupes from the 90s is that, with a few adjustments, the engine always fits perfectly where the back seats go. The problem is most cars aren't made to handle the weight in such a small space, but it's never so bad a light rollcage and a firewall couldn't fix it. The bigger problems are the gas tank and the intakes, but again, these aren't problems that you couldn't work through. The bigger question is, how many American FWD coupes from the 90s are worth donating that kind of attention to?
The aforementioned Grand Prix would be incredible with its engine midmounted, but it's kind of heavy as are the Riviera and other W-Bodies. The Sebring and its mates (like the Stratus) look decent but are a tad too fragile, hard to work with. Ford had no large FWD coupe, they had the Mustang. The smaller Chevy and Dodge coupes, with the notable exception of the Beretta Z26, are ugly as shit by anyone's standards and definitely wouldn't sell to anyone. This leaves just the Probe, light and compact with V-6 power, the most physically fit model to move the engine back in. That said, I'll probably do it to a GTP once I find a decent one with no rust.
So, what are your future classics?