Re: Gearbox question
You'd probably be better off with the 6 speed if you ask me, those closer ratios is what the V6 needs for best acceleration. If you think about it, my 1st gear takes me to 30mph at 5k rpm. It would mean you're topping out at 40mph in first gear! Second would be good for 67mph (6,700 is your redline, right?) Third, well that would take you to 107mph.. I bet your 4th doesn't take you much past 110 as it is, so in effect the acceleration you have in 4th now would be the acceleration you have in 3rd if you swap for the 'chugger' box.
Maybe just swap your 6th cog for a 5th cog out of an old 'chugger', or the 6th cog out of a later one, otherwise you're going to sacrifice acceleration..
Is your priority a higher top speed? Or just being able to cruise "fast" and not do crazy rpms?