[bobcowan]

I have a 5 speed, with a .64 5th. I find 3.55 to be the perfect gear. Lowest speed in 5th is about 60mph. As I cruise down the highway, even when traffic slows considerably, I don't need to down shift. When I drive the back roads, I can generally use 5th without any problems. Cruising at 80mph, I generally run about 2600 rpm's.

My rpm differance between 4th and 5th is about 1,000 rpm's. That's a lot.

Since you'll have 2 OD gears, 3.55 might work well for you, too. Easy cruising at 80mph. But not a huge drop if you do need to down shift.

In a street car, I like a low first gear ratio; mine has a 3.29 1st gear. It makes the car very easy to drive in traffic, in parking lots, into the garage, onto a trailer, etc. Although I could, I rarely start out in second.