I've read Yvonne's page on the Charley Project before and she seems like a good match. Both girls were tall at 5'10" and wearing cut-off shorts. I can also see someone who worked outside pumping gas wearing men's tennis shoes for comfort.
Yvonne disappeared from Ohio on August 8 and Jane Doe was found in Washington on August 14. That's quite a distance but I still think the match sounds good.
Jane Doe's page lists underpants among her clothing but no bra, and that tank top is so "strappy" I wonder if it could have been worn under another shirt in place of a bra. Yvonne's CP page mentions she was last seen wearing a yellow t-shirt but it doesn't mention whether that shirt had a Sunoco logo on it. (Sunoco's logo is yellow and blue.) It's possible she could have been wearing the tank top in place of a bra. She's described as 5'10" and 135 pounds, and women with slim builds tend to have smaller busts so a bra might be optional. I can see someone running away discarding any clothing that would identify her workplace, as well as an abductor making her remove something that would identify her as a Sunoco employee.
Does anyone here remember what Sunoco employees wore in the late Seventies? Was it a company-wide standard or did each station have its own uniform (coveralls vs. t-shirts for warmer weather?)