You could do a g-force T56 so you could choose your ratio's. To get a really nice well round transmission with good gear spacing, you end up with a 6 speed. If it was a just a drag or road race car, a 5 speed would work well enough. The other option is a hewland/hollinger/quaife/PPG but they can be pretty pricey, then again you can dictate your ratio's. The hollinger is worth more than most FD's, but its a really slick transmission.

I have a HKS 6 speed, it is a wicked transmission, driving a dog box is not for everyone, especially on the street, and with the HKS box, if you break it, good luck repairing it, since HKS does not sell parts for it. If it breaks, they want you to box up the whole transmission and send it back, that gets a little pricey. That being said, when mine broke I had a local transmission guru take it apart, lucky nothing was broken just a nut backed off. The nice thing about it, is it bolts in with no fuss.

The quaife is still available as the 6 speed kit, Greddy use to sell it as their own.

Not to many people do the tranny upgrade as it cost so much, but the dog gear mod makes a world of difference on a boosted car, say goodbye to turbo lag.

which 6 spd tranny has the best gear ratio?