Fact about average man's weight
Here's a fact from US government: Avg weight of men is now 191. When FV started, the average man weighed 25 pounds less or 166. Most "National" cars can be near 1025 with 191 pound driver and no ballast. But that means HALF of men are over 191 and cannot get to 1025. Do you want half of the potential drivers to be at a disadvantage? 1040 makes the class more attractive.
More competition is better than less.
Bam Bam is right. Those with enough time and money can probably be competitive at 1025. Increasing to 1040 would reduce time and money required. No data on how participation would hypothetically increase will ever be available. But just as lower prices usually increases demand, less time and money required will increase participation. Increased participation also increases competition. Some current participants must be OK racing against F500 and FF. I would rather compete against 25 FV's than 8.
Average weights (and heights)
In the early 60's the average height of a male between 20 -74 was 5' 8" and weight was 166 lbs. In 2002 the average height was 5' 91/2" and weight was 191. So we're taller and heavier. What was the weight minimum in 1963 compared to today and what did a top motor make in horsepower in 1963? Perhaps there is a way to compare Height/ driver weight / car weight /horsepower 1963 to 2012... just saying