Need help timing 318/360 Magnum

So I have my motor in all the way and running, But its really hard to start if its cold, and when I throttle up to WOT fast it backfires through the carb and spits a flame out the carb, I have the timing set at 10degrees advanced. I'm running full MSD setup, wires,distributor,coil and 6al. What should my overall advance be?

Motor Specs:

318 bottom end .60 over, pretty large cam, 360 magnum heads, ported polished, aluminum intake and a edelbrock 650cfm.

Where can I get the little timing strip I can place on my Balancer?

Any help would be greatly appreciated.

Thanks
-Chris
Author: admin