You said some spots are hotter than others. Are you using an IR temperature sensor? Not sure what year your Corvette is but it could be a partially or fully plugged catalytic converter causing the heat. Is the heat riser functioning properly?

1973 L-82 4 spd

All that has been removed, engine completely rebuilt now has headers

Did you replace the foil covered tunnel insulation under the body and over the transmission? Also there is a foam insert you can squeeze between the firewall and top of the bell housing. Does a great job on my 72' for heat. No headers on mine, just stock.

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You can have the headers coated by Jet Hot and that will eliminate a lot of the heat under the hood.

1973 L-82 4 spd

Yes i did

Header wrap comes to mind for that side.

I am wanting yo find out why it would be, havent check for possible vac leak yet and also possible valves on that side might need more adjustments, not sure, gotta be reason why its that way

Going out on a limb here - but is it possible that there are some blockages in the water jacket passages on that side?

Had overheating issues with the '28 Model A when we were getting it running again after a 30+ year slumber.  A thorough flushing of the block did force out a bunch of crud but evidently not enough, a rebuild of the water pump didn't fix it neither did a new radiator.  It wasn't until the head was pulled that we discovered crud blocking several of the water jacket passages.  A combination of air pressure and water pressure cleared out a bunch more crud and after getting everything back together it never overheated again.

Jim Olson 

"The Toys"...!!!  Save the Wave!

Where I've been in a Corvette...!!!

The car is running fine for most part, it is not overheating, when using heat gun on headers the passenger side is way way hotter than drivers, and its puzzling me as to why

Cindy, first remind us all of what intake/carb you are using.

Are you taking these temps while idling? If so, try checking the temps at 2000rpm as well, and see how they compare side/side. You might be surprised.  Depending on the intake/carb set-up, a lean idle mixture to one side could explain the temp differences. An intake manifold gasket leak would do the same. Post the numbers for each header tube for us, so we can see the difference. If the engine is idling, and running fine, you may be chasing a ghost here.

Joel Adams
C3VR Lifetime Member #56    
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

One thing I could think of but cannot think of a reason why it would happen would be that that side is running leaner then the other.

1973 L-82 4 spd