What is the point in overclocking only 65Mhz if you have to run at 1.825v. That is part of your problem. Also the case temps are taken from the bottom front of the case on the KT7 boards. This is right in front of the front fan and does not represent the temps around the CPU. Open your case and blow a house fan in and see how much your CPU temps improve. If it is more than 1-2'C, you need to improve your case cooling. Front and rear fans (not counting the PS fan) are a minimum. Blow holes in the top and/or side (and even the bottom) are also nice for cooling.
Also some people are haveing trouble getting the SocketA heatsinks to sit 100% flat on the CPU. This has a hugh effect on the cooling. Try reseating the heatsink.
You could also try reversing the fan on the CPU, some say it helps (usually not much though).
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