Just my opinion.
Be careful not to gear too high for Road America.
Don't automatically think you can run gear ratios that modern cars can run.
Two reasons I say this:
1. The Reynard while a great car is not as aerodynamic as modern cars. Closer to a barn door.
2. I'm guessing your engine is not a top shelf "super engine" from somebody like QS or Knapp. (I'm basing that on the fact you changed your own cam without the aid of a dyno. ;))
We all want to go as fast as we can, And the run into T5 is exciting. But, if you gear too high you will sacrifice the ability to accelerate up to redline. That said I would keep the drop between 3rd and 4th gears somewhere around 700 to 800 rpm.
On the track you would also like to keep the revs in first gear above 5000 so you are not bogging coming out of an apex.
Obviously stuff you already know.
Maybe a 23/24 fourth gear. or, 25/26.
If you see you not are hitting at least 6700 at the end of the straights in 4th, drop to something like a 24/26.
It's more fun, and faster, to drive a car with a little "zip" than one that is just droning along.
It's not if you can run 143, it's more important how fast you get to that speed. Better to accelerate faster to 138, than slowly to 143.
As always... YMMV
