Welcome to the forums!
That seems to be a fairly popular tyre size. It's a high-ish profile, might be worth watching how close the tyre is when the suspension is under near-full compression - you might get some rubbing happening.
Other than that, a wheel alignment is always recommended when fitting new tyres - just to be sure!
The Navara was designed with 17" rims in mind - here in Aus, they rip those off and put 16" rims. It's probably to do with the taller sidewalls being better for the rougher terrain (did I say "Dungog Shire Council roads" or rougher terrain? It's very, very similar).
Your geometry should be fine, speedo will be more accurate too!