I saw on thier website that they do indeed make a supercharger for speed density. Kenne Bell is well known for thier superchargers and from all I have read are a pretty straightforward install. they actually have directions you can download from the sight so you can see if you want to DIY. They also can hook you up with a mechanic in your area that can install it for you....assuming you aren't out in the middle of no where!
The Kenne Bell is my next addition to my '88 Speed Density after headers and exhaust.
I've had a Vortech supercharger on my 86 speed density mustang for over 20 years. A check-off valve was installed to trick the computer when it senses the boost. Dyno Tunes (MN) figured this out in 1990 and Vortech and Paxton used it after testing the method.