The 1973 Pontiac Firebird Formula 400 4-speed you've described is an exceptional classic car with a rich history and a well-documented provenance. The extensive list of factory options, including the Electric rear window defroster, Safe-T-Track rear differential, power disc front brakes, 400 cid V8 engine, 4-speed manual close ratio transmission, Formula steering wheel, variable ratio power steering, honeycomb wheels, and various interior and exterior customizations, showcases the attention to detail in its original configuration. With just over 61,000 miles, the car is described as retaining much originality. The one repaint in its original factory color adds to its appeal, and the fact that the miles are believed to be original, along with the motor being numbers matching, further enhances its authenticity. Mechanically, it's noted to drive excellently, with a strong engine, tight suspension and steering, and reliable stopping power. The cosmetic aspects, both exterior and interior, are well-maintained, with the older repaint showing well and the interior appearing clean and original. The rarity of this Formula Firebird, especially with a 4-speed transmission, makes it a sought-after and respected classic. The documentation, including the original window sticker, California pink slip, original books, PHS documentation, and recent service history, adds to its provenance and collector appeal.