I need a water pump rebuild kit for a 318 non a/c car...

Here's a rebuild kit for your pump

NOS Mopar # 3004815 water pump kit 1969 A, B body 318-340 w/ A/C Dart-Barracuda | eBay

Here's a NOS mopar water pump that is correct for '68-69

1968 1969 Duster Dart Cuda Swinger GTS GT Valiant NOS MoPar 318 340 WATER PUMP | eBay