Best all round YZ2

[westyguesty]

I have recently got a second hand original YZ2 with a few upgrades, including an unused 3 gear box.
I'm just wondering what you opinions would be the best all round YZ2 for astro tracks, wet and dry I will only be using one car and don't usually get time to swap gearboxes, diffs etc.

3 or 4 gear, gear or ball diff, shocks front or rear.

Thanks,