Front Drum brake troubles on a 1964 Dart

First thing to do is get you a factory service manual. They are free for download at mymopar.com or if they don't have one, go on ebay and get one. That's FACTORY CHRYSLER, not some Haynes, Chiltons or other hogwash.

1st. Lets get your terminology straightened out. Drum brakes have shoes, not pads. Remember that so we all know what you're talking about and will have a better chance of helping you help you. Using correct terminology avoids confusion.

2nd. Drum brakes are very, very simple. You don't just get out the check book. You need to do some actual diagnosis.

3rd If your "mechanic" is having trouble with drum brakes, find another one, or do it yourself. These cars are old school technology and you could literally train a chimp to work on them. There's zero excuse to take it to someone unless you are physically unable to do it. If you can turn a nut on a bolt with a wrench or ratchet, you can do anything to these old cars. All you need is the correct service manual and maybe some assistance from a certain online forum you found all by yourself.