Sentence:  “I don't know how you and the ‘head,' as you call him, will <WSD>get on</WSD>, but I do know that if you call my duds a ‘livery' again there'll be trouble. It's bad enough to go around togged out like a life saver on a drill day, but I can stand that 'cause I'm paid for it. […]” 
Meaning of the word marked with <WSD> tags:  To have a good relationship; to get along.