People collect cars.you can find any part for the fox body ,the square body .jeeps military type.to include dash parts ,seats and body panels and every minor accessory .all aftermarket to oem specs.that excludes many due the sheer hobby costs .but it's not impossible.i know a coworker who has three fox bodies and restored one fully and another will be .I think people will still be able to drive a 68 corvette. They might have to make a part or the gas to drive it
Cars need a steady supply of parts as they age. the industry is always changing to what is knew they have to. There's not many factories making old parts
All stick with a 302.