Wow. What a cool site. Thank you.

I have thought long and hard about whether or not to go with a Passon OD unit in my Cuda, as well as the Bee, but that site helped me decide that since the Cuda has a 3.91 and all I really save is about 700 RPM at 80 mph (significant, yes, but worth it?), I think I'll just leave it as is. With the Bee, I have to buy new gears anyway, so I'll still go with the OD unit for that one since it'll be nice to have a taller gear in it. If I run a 4.56 in the Bee with the Passon gear set, I'll have a final drive at 80 mph at just about where the Cuda is now - 3,700 RPMs.

VERY helpful and cool site!