I would just add more verbage to the following to cover any ballast concerns and call it a day.

An aluminum trans cooler and some braided 6an line is not that much weight.

6.7 Ballast
Up to 150lbs of ballast is allowed, but no farther rearward than the plane of the front of the main hoop
of the roll cage. Each ballast piece may not be taller than three inches or stacked higher than three
inches. Ballast must be securely fastened and approved by NASA tech/safety officials. Battery boxes,
cool suit mounts, and other added components made excessively heavy may be determined by
NASA tech or CMC Officials to serve as ballast and therefore not allowed farther rearward than the
plane of the front of the main hoop.
Now if someone decides to take an old radiator and mount it in the trunk then yeah...