This is the place where the majority of the warbird (aircraft that have survived military service) discussions will take place. Specialized forums may be added in the new future
A perfect example of AN and AC fittings, one thing they should have said was AC fitting were replaced by AN and are not interchangeable. When Sentimental Journey went into the blast fence in Burbank many years ago, it was because of a AC nut being used on a AN fitting.