Timing ??

I'm 19 and have been around Mopars my whole life. I've had my Duster since age 16 and have since rebuilt the whole thing. I'm looking for advice on what to set timing at. Here's the specs: .030 over 360, stock 1.88/1.60 heads stock pistons, MP .430/.450 cam with .268 ADV. dur., Holley strip dominator single plane hi rise intake (might switch back to stock iron dual plane before saturday) Holley 750 cfm double pumper. everything else in motor is stock but rebuilt with about 4k on it. The car has an MSD 6AL box, MSD Billet dist. with I believe the "loose" springs in it. It's got Hooker headers and a 3" exhaust with an H pipe and flowmaster's. I've got a 727 that I just put a 10" 3000-3500 Coan converter in and a Turbo Action rev. manual VB. I've got a 4.56 gear in right now (8 3/4 rear) but might bump down to 3.91 if I run out of top end with the 4.56. The car weighs about 3150 with me in it and almost full tank. My best ET last year was 14.55 at 96mph with a stock converter, slushie shifts, 650 carb, feathering out of the hole or else bogging. at that time it had 2 1/2" exhaust and 3.55 gears. feel free to post what you think I should try for timing and what you think it might run.