cooling my slant 6

How do you know you aren't overheating? You hook a temperature gauge up.

Or, alternatively, you can operate your own game of chance and SEE what happens without hooking up the gauge. Maybe it'll run cool and you'll enjoy the entire summer, or maybe you'll overheat it 'till the point it's red hot. Then it seizes tight as a drum and your entire summer is RUINED.

If it came with a 4-blade fan then it's a non-air car, and yes it's enough to cool it provided you don't have a stopped-up radiator.

Two comments concern me though...busted hose and always low on coolant. Coolant only escapes two places...out on the ground or out the exhaust.