Installed new clutch master cylinder

[92longranger]

Bled it while it was out of truck. Installed on truck now it's a little pressure on the pedal but not enough to make it shift when the truck is started. I purchased the new master cylinder after me and my daughter bled the old master cylinder. The clutch worked while truck was running the next day I went and tried to drive it and it was a no go. So I purchased new master and it's not working again. I have a vacuum bleeder but the slave cylinder doesn't have a bleeder screw can I bleed it from the master or do I need to purchase some bleeder screws and try it?