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The house was built in the 70’s. It’s pretty likely there's asbestos. ...
It's really hard to say. It can be Hit or Miss.
When my Sister did a New Roof on her house way back when, she was sure there was Asbestos in the Blown In Attic Insulation. There wasn't. But when she did Central A/C, they found that the old Gravity Heating Ducts did.
If there is Asbestos in the Attic Insulation or the "Popcorn", doing an Abatement isn't as big of a Deal as many believe it will be. Yeah, it will add to the project cost. But once it's gone future projects become more Realistic when you can Flash your No Asbestos Cert.