Timing request 100 shot 360

Hello FABO its been a while. My Dart is back on the road!!

Looking for technical advise on retarding my timing for 100 shot plate system. My engine, while freshly machined, has enough run time imo to introduce spray. Would like to know where the safe zone is.

My set up:
73 swinger @ 3,240# w/o me in it
Calvert 90/10 up front, tubular A arms, Adj strut rods
8-3/4" spool w/ 4:56 gears & 275/60 M/T ET Street SS tires
Slapper bars to modded steel gussets w/ welded frame connectors
727 & Hughes 4,000 rpm stall
.030 360 w/ kb107's standard stroke @ 10.7 comp w about 40 hrs run time
rhs heads from brian @ imm (2.02 stain valves, bee hive springs, bowl work..how he sets em up)
prw 1.6 stainless roller rockers
.600" valve lift int/exh dur @ .006 295 int & 307 exh w/ 108 lobe sep. set @ 2* advanced
billet cam gear double roller chain w/ v6 tensioner installed
TTI 1-5/8-1-3/4" step headers to dual 3" exhaust w/ dynomax super turbos
Weiand x-celerator 7545 open pl intake
Elelbrock 750 cfm carb running 100 octane low lead fuel
Plate system N2O....I have nozzles for 75, 100 & 140 shots
msd 6al ignition
msd pro billet distributor w/ 36* all in

I believe timing should be 30* to maybe 32*@ full advance for 100 shot to be safe. PLEASE ADVISE FABO as I do not want to damage what is a sweet running little power plant.

Motive:
I have an old acquaintance w a 06 gto 6.0 trick flow heads, cam, stall, big throttle body, 3:73 & sticky tires who looks to run my dart. His car weighs 3,725# vs my 3,240# He claims he makes 500hp. Just seeing his car run looks faster than mine i must admit. I think i need the juice to have a shot to run on his level.

thx in advance for all your input!