If you are into restoring and rebuilding old cars, finding the right classic car parts can be almost a full-time job. There are two schools of thought on classical car restoration. Some people believe that authenticity is everything. They will go to junkyards, used car lots, auction houses, and anywhere else they can think of looking for all the classic car parts that can get. Other people think that the purpose is to hot rod your car and make it as powerful as possible. They don't care about historical authenticity. They will put brand-new engines in 40-year-old cars just to make them run faster.
I sort of fall in the middle between the two.