8v box on mine as I have found it after driving it with a 16v box until it went bang.
Fitting, piece of piss get an 8v clutch plate and put it back together.
1st, 2nd no different, 3rd slighty longer quicker pickup, it does say on the link that they are the same maybe my box is slightly different I don't know but 3rd is definitely different, 4th no difference 5th much longer so on private track tests 80 is 3800 which is good for fuel economy when cruising. 90 is 4200 then cam comes in top speed seems easier to reach as I found the 16v box ran out of puff at 120ish. now hitting 120 is about 5000 meaning I got much more to go.