RPM's
Keep in mind that unless you drive the car quite a bit it is going to take a very long time to recoup the $$ it takes to make any sort of major changes...especially the one that was mentioned about a Passion 5 gear. How much does he want for the box, 4k or so is what I seem to remember seeing some where. By the time you buy all the necessary parts you will be over 5k.....how long is it going to take to "save" that money in fuel costs? Sure, there are a few folks here that will tell you that you can find a complete pedal assembly/flywheel/clutch assembly for $300....but I have never been that lucky....