When I got the 383 up and running, it was full of mud instead of water, that got flushed for about a year. And, the temps ran up to about 200F when pushed. In efforts to get it down, larger 3 row radiator copper, high flow pump and thermostat, and spring in the lower hose that was sucking a bit. So now, when romped in hot weather, it gets up to about 195.....not happy. So, my current hi flow pump from the summit is the aluminum impeller with radial spoke type fins. I also got one...
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