1965 Barracuda, dies when put in gear

IvanH said
Oh man, cant answer that Im afraid. Not sure how too. Outing my lack of expertise

Well, that's VERY BASIC knowledge for an antique car enthusiast, so I suggest you read up and learn something new. Having said that, has it ever run good or is this a new vehicle you've gotten that doesn't run well? We need to start somewhere.