Not exactly Motown, but the first time I heard Hungry For Love, probably in 1965, I remember thinking that it sounded like a Motown record. When I got it, it was on an independent label called Ric Tic.
It wasn't until later years that i found out that the San Remo Strings had some members from Funk Brothers and the Detroit Symphony Orch. And it did eventually become part of Motown when Berry bought the label to eliminate competition and to expand his Motown label
https://www.youtube.com/watch?v=PS9z7ykqfQI