[Cobra University]

I agree with Richard's outlined specs to reduce variations.

It is tough to measure "chassis only".

17" wheels have a performance advantage compared to 15's. Not much, but enough to standout as apples vs. oranges. Some Cobra's cannot fit 15" wheels due to standard big brakes. I think the Johnex EQ has that issue. Huge brakes are standard. It WILL, however, carry a ton of merit if the 15" wheel Cobra runs similar laptimes as its 17" colleagues.

Same issue with Shelby's with standard big-block issue. Maybe the big-block will post more mph down the straight, but can it turn? If big-block is standard, then big-block it is. If a choice is available, then default to 351.

Perhaps adhere to Richard's "as advertised" specs, but with an added commentary from the driver.
(ie. "This car ran great with the standard 15" wheels. Yada yada yada blah blah blah... I would recommend the optional 17" wheels for even more traction.")

Have the test driver commentary for each car, along with recommended upgrades for best performance.
Then post results in chart form for lap time, G's on skid pad, slalom, and braking.
And let the readers review the performance charts along with "price as tested" and optional equipment available.

No "Top-Dog", so that every manufacturer looks good. Everyone wins through the print exposure.

I would also suggest using the short course at Willow Springs (Streets), because they have more turns/less straights to compare best handling not the fastest. And they have skid pad/slalom facilities.