I just used a C&R radiator with single spal fan, lower temp thermostat, can't remember what kind, the only time I saw temps over half way was at an auto-x at 100+ degree temps. I just used plain green prestone mixed 60/40. I would start with checking for air on the system, then maybe try experimenting with the stock radiator and the e-fans. I'll probably get flamed but I would avoid the clutch fan if possible, I definitely noticed a difference in quickness of revs when I went to the e-fan.
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