What would be the correct part number for a heater core on a 1986 GN? I am assuming that the heater core is different if it is a Regal or T-Type with a v-6 or a V-8 - correct?
I'm showing a NAPA Number of 6603074 W/O AC & 6603531 W/ AC. That is for a Regal (they don't list it as a GN) with a 3.8 V6. They list a 305 and a 307 V8 engine also??? EDIT: OK I went back and checked the numbers, 6603074 is W/O AC for V6 & V8. 6603531 is for V6 W / AC & 6603062 is for V8 W / AC.
