wrote

Don't know if they actually sell it, but Soloy was working on it a
few years back. Check out their site :
http://www.soloy.com/dualpac.html

John Galban=====N4BQ (PA28-180)

Which would lead you to believe that it would be considered a twin engine.
Reason I say this is, because one reason for the two pac was to get the
single engine restrictions lifted for that plane. (61 MPH stall)
--
Jim in NC