I was curious about the dimensions of typical (for real) LMP cars. Turns out that the Audi R10 LMP car is 2,000mm wide, 4,650mm in length, and 1,030mm in height. The scale width is 83.3mm by dividing by 24. So, our new rule of limiting slot car bodies at 84mm looks very good in my opinion, scale wise. The Red Fox body is 82mm wide in the rear and is 80mm wide in the front.
Also, another point is that the race car maintains the front tray, so we can not let that be cut away. There is a very good trim line on the Red Fox Audi R10 which clearly maintains the front tray.
I purchased 2 of these bodies from Bill Pinch; painted them in red and silver; and mounted 1 of them. These bodies look really great; lots of detail. I trimmed the first body on the trim line at the sides and just below the trim line in front, leaving the trim line barely visible. I punched the holes for the body pins with the bottom edge of the body flush with the bottom of the chassis. Here are some pics. The P/N is RFSC33.