How's my first overclock?

This is my first proper overclock, and I'm pretty happy with it. Except the temperatures, which should be fixed by re-applying some new thermal paste. Anything I should change?

E6600@3.4Ghz- 9x378mhz
Idle temperature- about 40 degrees
Load temperature- 64 degrees maximum
CPU voltage- 1.38750 volts
Memory multiplier- 2 (756mhz)
CPU cooler- Tuniq Tower 120

I think the temps are so high because I didn't apply the thermal paste properly. Is 64 degrees safe for a few days until I buy some more thermal paste properly? I assume it will be, because 62 degrees was the load temp with the Intel HSF at 2.4ghz.

Thanks.