[1991 GT-R overheating]

Appreciate the help guys. 

Pulled out the thermostat and tested it. It appeared to be working, found a replacement at a parts store off a 95 300zx so minus well change that out since I was already in there. 

Next up is the clutch fan. I remember spinning it but it didn't seem to put up much resistance, trying to find one locally (I'm located in Texas) I looked around and read a 1991 Pathfinder clutch fan works. Do we know if this is accurate?

[1991 GT-R overheating]

What's going on guys? I have a 1991 GTR and just got it. Its currently overheating and when it does the oil temps get up there too.

I tried to search but didn't see the issue i was having. I have a theory on what it might be but I'm going to wait and chime in when you gurus reply.

Hint: thinking its the water pump because oil temp and coolant temp go up at the same time, meaning its not circulating as it should. Gets so hot it starts to boil.