Thermostat or No Thermostat?

SLC Duster Dude said
360 .40 over, stock pistons, Eddie heads, Air Gap manifold, medium Eddie cam, headers aluminum radiator and electric fan.

I always have an overheating problem when the temps get over 85°. Not driving down the highway, but as soon as I slow down or wait at a light. The radiator is in excellent shape, no crud or anything. New 13psi cap too. I took the thermostat out last year thinking it would help but it doesn't. The electric fan is 16" high flow (2400 cfm) and goes almost top to bottom but not side to side.

Thoughts? Ideas?
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Running without a thermostat is not a good idea... It makes the engine warm up slower which increases wear.... 80 - 90 % of wear happens when the engine is cold...

You need a good shroud and make all of the air from the radiator go through the shroud... Not all electric fans have a large enough shroud to cover the whole surface area of the radiator...

The shroud should act like a funnel so all of the air passing through the radiator goes through the fan...