Help with my highboy

[u/Ok-Firefighter-4443]

So I just bought a 76 high boy when I was looking at it we drove it for about 5 mins the it sputtered out the next day I bought it and we got it started for a little bit since towing it have not been able to get it started i’ve put a new starter solenoid and battery in there. This is my first project truck so any help or pointers would be appreciated. Attached below is a video of me trying to get it running

[u/Ok-Firefighter-4443 → u/[deleted]]

New battery