Speakers in A/C Outlets ?

[Ironhorse]

Curious, my truck is a plain jane Custom/10 without factory A/C. Am contemplating the idea of installing a pair of the dash A/C outlets with speakers mounted in them to project the sound into the cab area. Anyone ever done this? Have a true factory AM/FM in the stock radio mount area and will mount a am/fm/cassette/CD on the floor hump. Have a splitter for the antenna so will be able to run two radios off of the stock fender mount antenna.