Humm try a Flow kooler water pump they are the best. Or just swap in a flow kooler impeller disc kit. But you already have a high flow pump so first try a Flex-a-lite mechanical fan the rigid kind. Also Kit's do exist to increase the caspsity of your radiator with a smaller remote raditor. Also check to make sure the coolant is actually flowing evenly over your raditor.
If that dossen't work then you should go for a 3 or 4 core radiator and a electric fan. Hope this info helps a bit.
Better to be "dead and cool" than alive and uncool.
1999, Sport, 4-door, 4L-I6, AW4 auto, np231, 8.25 rear, dana 30 h-p.
BFG T/A KO P235 tires, KC 130w slimline lights, skid-row t-case skid more to come!