Dan and Karen Gallant started Gallant Racing Supplies, Inc. in the early 1970's from their Oakland, CA shop. With Dan as the Chassis builder and Karen handling the engine building and service, they quickly gained a reputation for providing a top quality racing services to their customers.

In 1979 Mark Pielsticker commissioned Gallant Racing to build him a Monza racecar to compete in the SCCA Trans-Am CAT-I division. The Gallant c/n 001 Monza chassis made it's first appearance at Laguna Seca Raceway Trans-Am in 1979. But a bad crash saw to it's end. 

A second Gallant c/n 002 Monza was constructed for the 1980 SCCA Trans-Am season and the new single category. Pielsticker's #33 black Monza was sponsored by International Harvester. The GT Monza racecar became a fierce competitor in the hands of Mark Pielsticker.  He would score a victory at Portland, as well as several top ten results, to record a fifth place finish in the Trans-Am season ending points championship. Mark continued racing the Monza for the 1981 Trans-Am season. He was also Pacific Coast SCCA Runoffs GT-1 Championship.  Mark continued to race the Monza until 1982.

The first two Gallant chassis were built for Mark Pielsticker as complete turn key cars. The third chassis, Gallant c/n 003, was a roller for Ardi Oji. According to Oji, the front suspension geometry was not right, so the front clip was cut off and replaced by a stock-car product front clip. Ardi was sponsored by John Deere Tractors. The car was painted John Deer green with yellow wheels.  In addition to Trans-Am and IMSA GT series, the car was also entered in select SCCA regional GT-1 races.  The car was sold in the late 1980's to Richard Iskederian (brother of Ed, founder of Isky cams). Currently, its whereabouts are unknown.

A total of six Gallant Monza chassis are said to have been built. Today, the whereabouts of these cars is unknown, but some may have found their way to South America.