My 1990 Marlin is a SeaV2 hull, but all Marlins were SeaV2 since introduction in 1989. The SeaV2 was phased in over many years across the product line.
That being said, I'm not sure about the Atlantic. I though it was based on the Sailfish hull which was not SeaV2 until 1993. It is not listed in the brochure for your model year, so call grady to be sure. An email from them would be best if it is fact a SeaV2 hull so that you can provide it to smart ebayers. All that aside, the boat is a Grady and even pre SeaV2 hulls rode well. jh