The last year of Grady Drive on the Sailfish as an option was 1993, in 1994 the euro transom appeared, Grady's so called integrated transom.
In both cases, the bottom of the drives were flat.
In 1998 the flat bottom was no more, the V hull went all the way back. The boat never was made longer, overall.
You would only know this from looking up from the bottom at the stern.