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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It's an electric fan so nothing can be done about shroud and fan depth .
Pretty obvious but I'll ask... is it pushing the air if you have it as a pusher and/or pulling if you have it set up as a puller? Blade usually has to be flipped depending on direction of flow.
I had the same issues and ended up going to a factory shroud and fan clutch and solved it. If you want to stay electric I have a dual fan your welcome to try and a couple different fan blades and fan clutches we can try.