Veiled incubation questions

My chameleon book says 80-86 degrees, but a care sheet I have for breeding says 75-80. I have the eggs at 79, but what is the best temp to incubate at? Also, does anyone know how long eggs can survive if the dam is full term, but dies after digging the tunnel? She dug the egg tunnel, then when she didn't come out after 36 hours I excavated the tunnel and she was dead at the bottom. She was very healthy and the tunnel didn't clapse or anything, so I am at a loss. When I removed her I could feel huge eggs in her so I decided to surgically remove the egg case post mortem to try to save the babies. The case contained what looks like 29 good eggs and 2 slugs. I just hope I got to them in time. Would they most likely have died once the mother stopped breathing, or is there a chance they will be ok. The case was obviously still very moist, as were the eggs, and it had red blood vessels throughout. The eggs slipped right out of the end and I put them in moist vermiculite. Any info is appreciated.

R.I.P Jade.

I am not sure about the rest, But I would "err" toward the cool end as far as temps. We used to have some hatch with eye problems at 80 degrees, not sure but I think it was due to premature hatch due to too high temps in inc. good luck

Thanks, casey. I'm lowering the temp to 78 until I hear different. I had them at 77.5 until I read my cham book over again. It said 80-86, but it's obviously a poorly written book on the subject. Any other help is still greatly appreciated. I'll keep this thread updated on the eggs, but I hope someone can post with their knowledge/experience about my current situation in the mean time.
Jake Wallace