Hello all what a top site , have A 92 MODEL DUAL CAB NAVARA and have ordered a TD27T out of Terrano to replace NA stock 2.7 , interested in peoples ideas looking to off road but ideally wanting to know how to gain decent highway driving as will be my everyday drive eg: achieving around 110kms at under 3000rpm would be ideal, am reasonably mechanically minded , will i have to change Diff ratio?. A m really excited to hear peoples feedback and mods that can be applied to new motor, have heard as long as maintained will not miss a beat, would enlarging tyre circumfrence improve cruising ability have been told on flat is like an extra half gear. thanks for everyones time.