I sell quite a few of the Autorad units. There quality looks like something we might try and build. the PRC units look like miter cut projects with exposed welds. If I'm going to buy something that we use on one of our builds I want it to be as good as we would build or better. The Autorad Unit is really nice quality, all welds are sanded smooth and drilled and taped holes make things clean. AutoRad's radiators are bigger in most cases.
We sometimes run the fan circuit off the ECU or Ron Francis makes a really nice Controller also. It is fully adjustable and uses a wire lead that can hook anywhere to the block. It requires more knowledge to set up as far as a tem gun, But is really clean and does not use a thermostat sender. Just an Eyelet hooked to a bolt on the cylinder head.
The other hard part about the ECU fan signal is getting the AC to work with that properly. The external fan switches address that more easily.
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