Thanks for all the input so far.

Re: temp.
I guess i need to clarify what i mean by 180-220+

I drive the truck somewhere.
I turn it off for 5 or 10 minutes.
During that time the water in the block heats up since it is not circulating.
I get back in the truck and turn the key on - I do not start it.
The temp reads 180-220+.
I start the truck and within a couple minutes it is reading a steady 180 in normal traffic.
Carb bogs at heavy throttle but drive normally under light throttle.
After a few minutes of normal small town traffic it clears up and then i am able to floor it without a bog.

Ben