Your car has to have the double row for three reasons:
1. I've also read that in 1984 they all came with the double row.
2. I can't imagine a dealer / independent would do a timing chain replacement and not convert to a double row.
3. All of the 380 SL / SEL's that had the single row that weren't converted have all by now probably blown up.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".