I have a 91 fan shroud with a volvo fan nested in it controlled by a delta current control for a varible speed depending on the temp comes with all the wiring had it on my 91 for about 2 months before I sold the truck you can put the sensor in a pan of waterput the heat to it and watch it work its awesome you gain hp by losing the clucth fan call me Bill 571-237-0140 $140.00 can email pics if needed
its a direct drop in remove your clutch fan and shroud and drop this shroud back in with the same bolts and wire up simple