Timing for a 318

Nope, it's too retarded. My 318 Duster ran like crap when I first got it (backfiring, stumbling, stalling, etc.) until I bumped the initial timing up. Started out at 10* ATDC, I put it all the way to 12* BTDC and now it runs great. But, sometimes it still hesitates a little off idle, I think it's the carb. BTW if it was too advanced it would be detonating/pinging/knocking, not backfiring (unless it was at like 60* initial advance).