yeai didn't go for the low gear set... i think it might make to big of a spread between 1-2...
as for the gears i did the math for a 3.91 gear @ 65mph is 3131 rpm which is dead on...
with the same setup but with 4.86's its 3892rpm @ 65mph...
so thats 761 rpm... or 5761 trap... i think it should trap a little closer to 6 due to a better mph...