Away from IMSA, he tried his hand at CART racing, winning the 1983 Norton Michigan 500 in only his fourth Indycar start. After leading 66 of the 250 laps aboard the VDS Associates's Penske PC10, he passed Rick Mears on the last lap and took the checkered flag seconds later as Mears spun and crashed behind him. With a second place in the Caesars Palace Grand Prix (Las Vegas) and a further two third places, he would go on to finish 8th in points in 1983. Meanwhile, another new series, another victory first time out. This time in the Trans-Am series, he won for DeAtley Motorsports at Trois-Rivières.