Bad/Weak water pump?????

Treblig said
OK good. I thought there was an extra boss or threaded hole or something. If it's just the number of vanes then I'll get an 8 vane. I guess i could simply remove the thermostat completely and if I get lots of flow then I'll know for sure it's the thermostat, if there's still "low flow" (without the thermostat) then I'll know it's the water pump....RIGHT???

treblig
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I was going to suggest that, but you sure have a lot of stuff in the way to do twice if you just take it out.
If you do take it out drive it on the hiway before making the decision, because it could still be the radiator or crap in the block causing it.