Malossi 136 gearup quandry

using a zirri short 4th box, engine setup for fast road use, should i opt for th 2.56 or 2.34 gearup. i already have a 2.56 sittin on the shelf.

usuing zirri silent pipe

this engine is not going to be tuned for sprint/ race work but more for rideouts and rally going (will 2.34 be overkill)