Mind you, this was before I put the trim back on around the stereo.
The EATC front is from a late 90's Lincoln LS. Had to do some saudering for it to work. The Lincoln LS's fan control controls the SHO's fan backwards. Turning it down to low blasted the motor, high was almost nothing, and shutting the EATC off would make the fan run non-stop.
The EATC wires were long enough on their own to make it from their original area to the radio.
But the radio wires were too short, so I had to make about 6" extensions on the aftermarket wire harness to make them reach.
The antenna wire was just barely long enough, so maybe get an extension.
The EATC bolts in behind the dash, whereas the stereo has the fun retaining pins. I had to pull the center area apart and drill holes for the EATC unit to say put.
The new stereo location may not work right away without shaving down some of the bottom of the hole.
Just make sure not to pull the 5 vacuum control lines too hard, or they might come off the other end.