Forum:Legion Safehouse Reputation

Hey, so I'm trying to get the Legion to 'liked' without harming any of the NCR by giving Aurelius of Pheonix NCR dogtags to raise my reputation with them. I want to be able to get the lucky shades from their safehouse. I know you can pickpocket the dogtags from NCR but does anyone know how many I will need roughly to get to the appropriate reputation for the guy to give me the key? And is it 'liked' or do I have to be 'idolized'?