First model year for headers was '85. The only major difference '94/'95 headers had was a port for external EGR.
If your engine is overheating, your cooling system is inadequate, or the timing is incorrect, or the converters are plugged, or several other possible reasons. It is not the fault of the headers.
If your engine is overheating, your cooling system is inadequate, or the timing is incorrect, or the converters are plugged, or several other possible reasons. It is not the fault of the headers.