Your rebuttal is very logical, but my question is this... whats to stop him from just not going into top gear? If I were to build a car for both the 660 and te 1320, my 660 game wouldnt change a bit... except instead of shifting into that next gear, ride out the last couple hundred rpm and call it a day at the 660.
Example... lets say one built a car with a 3spd MVB trans. And it just so happens that you shift into 3rd, right at about 600ft. Now your optimum shift point is about 500rpm lower than your red line... so why not ride that gear for 60 more ft and not mess with anything? Then roll to the 1/4 and just hit your shift point at 600ft and call it day. I could see tuning for traction with clutches and read end gears, but swapping out trans for the track length just seems like a lot of unnecessary work... and Id think those guys would have figured that out by now. I guess I just dont really get why you wouldn't tune the gears you need for the 1/8, then build onto those for the 1/4, so you could just race both and just not upshift unless you ran the longer track... realistically, its only one more gear.