with its mid-size B-body based Chrysler Cordoba counterpart) was discontinued, as was with just the Magnum name itself, in favor of what would become a smaller, all newly designed, M-body platform based Mirada coupe (which also would be shared along with what would become its M-body platform based Chrysler Cordoba coupe counterpart as well) all during the next four model years (1980–1983). Only 3,704 1979 Dodge Magnum coupes included a T-Top. NASCAR The mid-size B-body 1978–1979 Dodge Magnum coupe in the United States and Canada was an addition to Chrysler's line up that allowed Richard Petty to continue racing with a Mopar. For the 1978 NASCAR season, the 1974 Charger that Chrysler teams had continued to use was no longer eligible for competition. Chrysler worked on several car designs to smooth out the current 1975 bodied Charger into something that would be reasonably aerodynamic for the big racetracks and the Magnum design was settled on in the summer of 1977 for use in the 1978 racing season. While not as aerodynamic as the 1974 Charger body, the shape of the Magnum showed promise, and the "Petty Enterprises" built test cars reached on test runs. At first it seemed that out on the tracks the cars ran well with Petty almost winning his Daytona 125 (finishing second), and leading over 30 laps of the Daytona 500 until a blown front tire caused him to wreck. However, the lack of factory development support of the small-block Chrysler 360 V8 as a race engine was becoming more of a problem, and in high speed racing traffic the Magnum did not handle well. Petty was particularly harsh in his criticism of the car - before the season he declared, "The Magnum is undriveable at 190 MPH." By the latter half of the 1978 season, Petty and Neil Bonnett (the two top Mopar teams) gave up on the car's inconsistent performance and switched to Chevrolets and Oldsmobiles, leaving independent drivers Buddy Arrington (who bought a few of Petty's Magnums, along with some parts), Frank Warren, and Country singer Marty Robbins to soldier on without any substantial factory support (Chrysler did provide sheet metal and some engine parts to teams driving Magnums). From August 1978, two to five independent teams showed up with Magnums in NASCAR races, until January 1981, when NASCAR switched to smaller bodied cars. The Magnum never enjoyed the racing heritage of its