if The avarus and the Hexer aren’t vintage enough for you, the Blackwater should do just fine. only 20 of those were made, because only 20 people need a rigid 1970 chopper.
1. Put “lpchopper” folder in GTA V/mods/update/x64/dlcpacks”
2. Add line “dlcpacks:/lpchopper” to “dlclist.xml” in “GTA V/mods/update/update.rpf/common/data”
3. Spawn: lpchopper
Credits:
LaPanne Engineering