The nova comes with modded parts that are Metas but those 2 metas cause a game crash is there a script or something I need to do to allow it to work?
If it crashes your game you most likely put in the wrong metas, didn’t type your __resource.lua correctly or the meta files contain other vehicles already modified in a resource. Check this out for some help. Hope I helped! 
Some vehicles just don’t work. Look at your __resource.lua like WafflezPlayz said. Otherwiese search another one.