Car repeatedly won't start

Hi, I have a 1967 Ford Mustang. I drive in mainly on the weekends. The carb is rebuilt within the last six months. I installed a new alternator about a month ago. The battery was leaking and so the car stopped running one day. I just put in a brand new battery. It still won’t start. It feels like it’s trying to start but just won’t turn over. Help please with any suggestions. I did clean the terminals and lubricated them as well when I installed the new battery.

Have you checked the starter solenoid? Are you sure the battery is fully charged? Make sure the battery terminal lubricant is not between the terminals and the battery posts on the inside. A lot of people make that mistake for one reason or another.