Short-hulled Perrys operated with SH-2 Seasprite helicopters.
Long-hulled Perrys operated with SH-60 Seahawks.
Seasprites are smaller than the Seahawks and lack the LAMPS interface with the controlling ship.
The Dragon Ingraham does not include a Seasprite. What John @ WEM was probably telling was that if you are modeling a short-hulled Perry, for accuracy sake you should not put a SH-60 on the flight deck.
The kit is of the Ingraham FFG-61, last of the class. It is a long-hull
As far as PE, are you sure you were checking on the 1:700 scale Perry set from WEM. Their 1:350 scale set is beautiful, but their current catalog doesn't show a corresponding set in 1:700.