Chassis number 4091GT was completed in November of 1962, as a Series 1 250 GTO (250GT/Comp 62). It never competed in its original incarnation.
Sergio Bettoja, the first owner of this GTO (chassis 4091GT), returned it to Ferrari in 1963 to be refitted with a 250 GTO/64 body, styled by Pininfarina and built by Scaglietti. This modification required work to the suspension, engine and body. It was given a short roof and built-in spoiler. It was one of four cars thus modified.
The next owner was Edoardo Lualdi and raced it successfully, winning the 1964 Italian Mountain Championship. It also won the GT class at the Targa Florio that year. The car retired from contemporary racing in 1967 and was acquired by the current owner in 1982. The car continues to be vintage raced and shown extensively.