Timing gurus. Recommended initial and total timing for a warmed ove 273 commando?

Time has come to start tune with the new parts (Ignitor II distributor).

1970 duster
1965 - 273 commando
Cam: Comp Cams Magnum 282S - 282/282 Lift 495/495 (solid) Beehive Springs
Edelbrock D4B intake / Holley 670 Street Avenger
Pertronix Ignitor & Flame Thrower coil
Hooker Headers
2.5" Dual Exhaust / Super 44 Flowmaster
8 3/4 - 3.55 - SureGrip
727 auto / Shift Kit
10" 2000 stall converter
B&M Quicksilver Shifter

It sure seem to like a lot of intitial timing. I have it at 19 right now, the response is really great and peppy. What do you recommend for a total timing, and at what RPM should I have it? I got a spring kit and advance limiters etc with the distributor.

I set initial at 19 yesterday and tuned the carb for best vacum at 800 rpm. I could not set the total myself, need a friend to help me check the tach and rev it up. I did take it for a ride and no pinging at 6500 rpm. It runs great I have to say.

Can someone help me understand total timing? Lets say Im at 40 now, with no pinging, is this ok? Or should I still strive to have it at about 36? Would there be powergains from this? Should I set the curve so it kick in as fast as possible? Say at around 2000 rpm?

Please help me understand to tune for best overall performance for my set up.