Install at \x64e\levels\gta5\vehicles.rpf 

Please don't upload to other sites without my perms

to fix car rolling over, locate your handling meta file at  update > update.rpf > common > data 
extract handling.meta and open with notepad then ctrl f and search for buffalo and replace the text below with the text in original handling.meta


<vecCentreOfMassOffset x="0.000000" y="0.000000" z="-0.350000" />



