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link to the 1978 catalog, where the Record Ace Mixte specs are listed on the final page. I can't seem to access the Bulgier.net catalogs any more without a user name. But it's probably not much different from 1978. Yes, they used a lot of Suntour componentry in those years, because they were cheaper and worked better than the other guys' stuff at the time.
I've only seen (in person) one Raleigh production step through, made from 531 frame tubing. It was a bike that came through the co-op once. It was sold to some smaller woman down in the San Francisco Bay area, who drove all the way up to Sacramento to get it. As a smaller (shorter) person, it was that valuable to her.