Just replaced the radiator on my '94 5 spd with a/c. The new one is a single row plastic and aluminum auto trans spec. While it's only one row, that row is at least twice as large as on the old radiator, about 3/4 in. or more. I'm really impressed by the quality and fit of this radiator, it's a Koyo A1140. I got it from
Hope this helps someone,
John ('94 Miata)