History for the Bus go to: https://en.wikipedia.org/wiki/Wayne_Busette
Installation 
OpenIV and go to this folder 
C:\Program Files\Rockstar Games\Grand Theft Auto V\mods\update\update.rpf\common\data
then copy this line of code into your DLCLIST.xml
<Item>dlcpacks:/wayne/</Item>
Save and close 
use either Add On Car Spawner or Enhanced Native Trainer 
Spawn with: wayne 
ACS: 1974 Wayne Busette Mini Bus\wayne
Got the Model from 
https://3dwarehouse.sketchup.com/model/u21cbf8f0-1cca-4b33-8be9-29956b339152/1974-Dodge-Wayne-Busette-School-Bus-Not-Mine-Old-Design?hl=en
