Old American cars are basically open hardware. An old American V8 has about a million options for everything, can get parts everywhere for cheap (I got a brake

Old American cars are basically open hardware. An old American V8 has about a million options for everything, can get parts everywhere for cheap (I got a brake rotor for $8 recently). It seems that it would be ideal to have the open source cad design files so you could make your own rotor when it breaks, until you realize it would cost you $1k to make one. If this is your goal get an American car from the 60s. The problem is they're super unreliable, because the things that make internal combustion engines reliable are complicated and not easily replicatable by the average hobbies engineer. I design this stuff for a living and I just buy a car, don't touch it, get it serviced at the dealer, and get a new one when I reach the right side of the bathtub curve and it's service life is up and is stops being reliable.