Do you know when the timing belt was last changed on this Aveo? If she doesn't know, or if it's been anywhere close to 60K, you might want to have her consider buying a new timing belt kit. The 4 part kits go for around $100, and it's naturally a great opportunity to do that work. Of course that decision depends on her finances, and also how long she would like to keep it, assuming nothing else major happens.

Are you buying the gasket and head bolts from Chevy, or do you have another good source?

When you just dove into the engine disassembly with no hesitation, I had a hunch about you having some type of significant auto background. I hope this lady understands how fortunate she is to have you working on her vehicle!