For a start, get rid of the elec fans. Fit a clutch fan with a severe duty clutch. Mopar Perf used to sell a fan+clutch kit, P4120758; may still be available. Use a shroud.
Often with cooling, it is not one single thing that reduces temps. Rather, a number of things that make small changes, but when added together, drop the temp a significant amount.
Pump pulley should be 10-20%
smaller in OD than crank pulley.
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www.stewartcomponents.com