Some differences of the Jim Busby Porsche 962 and the Al Holbert Porsche 962

Look at the side of the cars and notice the difference behind the front wheel how the openings are different, also at the back of the cars are different as well. The Miller car used a two plain rear wing while the Lowenbrau car used a single plain wing. There are other differences as well you can see in the two videos of the cars. In the video you can see how the Miller car the rear body work ends in front of the rear wings, also above the front tires is an air exit to allow air to exit the front end. 

The Busby team copied a lot of elements from the Nissan GTP car on this body work. Jim Busby sold this Miller Porsche 962 mid season in 1989 and switched over to a Nissan that he ran through the 1990 season. By 1989 the Porsche 962 was pretty much at the end of its life with Busby's team winning two races with this reworked Porsche 962 before he switched over to run a Nissan GTP car.