horn, cruise control, and over heating problems...

I have a 92 caprice with the 305. I have been having problems with it over heating and cannot get to the root of the problem. Put in new stat, water pump was bad, replaced that...but car doesnt overheat all the time...also horn and cruise does not work. Horns are newer, worked for awhile, then horn buttons broke, replaced those and horn did beep a few times while installing new buttons, but now nothing! have new horn relay but cant find it in car!!! anyone have any ideas???? Thanks

i have a 91 with the same overheating problem only some times but mine is only in the winter time so you might want to check the head or intake gaskets or even the head themselves.