K24a4 with k20a2 head . 12.5.1 compression drag cartel 3.2. Super tech valve kit going into an integra. Have a 5 speed out of a base rsx lying around, any good reasons to go with a 6 speed over the 5? High way driving is not a problem since car never sees the highway. Also if I go 5 speed now and want to swap to 6 speed in the future would I need to buy a new flywheel and clutch set up?