Ford upped the ante of performance for the Thunderbirds in 1963, and what truly made the Thunderbird stand out was the addition of the 390-cubic inch V-8 with three Holley two-barrel carburetors and nicknamed “M-code” due to the M designation in its chassis number, which signified this incredible tri-power unit. Along with the engine dress-up kit; the M-Code features a larger cam, special heads and larger dual exhaust.
