1984 Chevy Camaro 1984 Chevy Camaro overheating

I asked about my 84 Z28 overheating.I noticed the other day when I flushed the radiator that there was rust color around the intake manifold bolts. Alomst like the a little bit of fluid had seeped out of the bolts. My dad was actually able to tighten the bolts a little more than they were tightend. My heater is not working either. It's getting current however it's not working. But bear in mind the car sat in his driveway for almost a year before we replaced the motor.I asked a question about it overheating I was just curious if these other things possibly had something to do with my overheating problem. Because my dad seems to think its the clutch fan.