Is there an f-ing difference between a ford, chevy, or mopar in NASCAR?
NASCAR specifies a wedge motor, four barrel carb, flat tappet cam.. etc. Are there any REAL differences?
NO.
How about the Cars, they all use the EXACT same chassis. They all use the EXACT same Body.
From NASCAR, NHRA, IRL, to F1 they have all developed rules that over time have turned every car to be exactly the same. Automotive race technology development has stagnated.