If you want the car to spawn with a livery (instead of Benny's livery tuning options) replace the "carcols.meta" file
(Grand Theft Auto V\mods\update\x64\dlcpacks\ar1750gtv\dlc.rpf\data ) 
and texture(s) in the .ytd files
(Grand Theft Auto V\mods\update\x64\dlcpacks\ar1750gtv\dlc.rpf\x64\vehicles.rpf\)
Texture(s) from "+hiytd - 2048" folder you put in "ar1750gtv+hi.ytd" and
Texture(s) from "ytd - 1024" folder you put in "ar1750gtv.ytd"
You can also make (to add or replace) your own texture(s) using template. You just need to keep the texture names, in order starting from "1750naj_sign_1"

IMPORTANT: Before making that possible change, make sure you don't have a previous, original version of the vehicle stored somewhere in your garage, as this would crash the game.
