Yes I have Ironman 2" lift kit installed in it by the previous owner and both rims and tyres are also changed, it has 285/75R16 as compared to OEM 275/70R16.
I drove it on Motorway from Islamabad to Lahore as I got it from Isl.
Driving @110-120 km/h I did experienced somewhat weird at high speed too. The reason is that the lifted vehicles need to correct caster angle with caster bushed installed in it.
I got it checked by doing balancing alignment the other day and figured out that I am under the tolerance however I need to get suspension bushed checked thoroughly.
OEM tyre size in an LC80 seems bit smaller to me, I love looks of this monster with this setup al hamd o lillah.