launch rpm

What's your launch rpm? I have a
Duster with iron head 440/727 4:30 gear 28" x10 tires. Spool all together 11.77-11.90 et with 60' times around 1.58 1.60. My converter is a turbo action 3800 stall, 11". Ive been launching at 1500-1900. Id like to experiment with higher launches, any suggestions?