Maybe wrong water pump?

[68 Greenie]

Okay guys I'm sure you know by my other threads the problem Im having. You know the gauge climbing up and up and up. I just got to thinking that this is a 86 block but I'm running the ole v-belt system on it could I have the wrong water pump? Im sure in 86 it was a serpentine system which runs the opposite way. Right? This may be why the gauge climbs when im driving down the road and cools as Im idling. Just hit me. Let me know what you guys think. Thanks guys this site has been really helpful.