Like you said, bigger radiator, bigger fan, air shrouds are important. You can also lower your coolant to water ratio as water transfers heat better than glycol. Just keep enough glycol in there to keep the freeze protection you will need for your area. If you have no threat of freezing you can actually run 100% water and just add some water wetter or purple ice to keep the corrosion protection and water pump lubrication intact. That's what we do for our race bikes.
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1979 CJ7, FI 5.0L Ford, NP435, D300, Full floated D44 Detroit, D30 Detroit EZ Locker.