28/35 looks fairly standard.
but it really depends what kind of driving it's for and the state car. I have 265/75/16 mud tyres on my 110 and I run at 34psi all round for open road/motorway when it's not loaded (above that the ride gets hard on bad roads), 40psi at the back for the same road conditions when loaded, 28psi front 31psi back for gentle off roading.