As far as dependability goes, if your only running 6 or 7 psi,which is the most common on out of the box blowers,your really not cutting down on the life of the motor because the only time you see boost is under wide open throttle,unless your driving like a madman and start putting smaller pulleys on it.I've got a Vortech on mine and I have more miles with the blower than without,and I've had a few problems since the blower was installed,but I don't attribute it to anything but driving it a little harder than I should and running 10 lbs. of boost.I don't think you'd be dissapointed.
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Duffy Douglas
Built Ford Tough, Moderator
The Mustang Works Magazine
Blown & Flamed F150