OK, I've got details on how to remove the Grand Prix's ashtray, and I'm convinced that the Empeg will fit in the hole that's left (I've seen pictures of a fellow who put a DIN-sized EQ there).

One last question, then I'll quit bugging ya'll about this issue;
I'm about to buy the $55 Clarion FM modulator for this project. However, the Clarion FM modulator has an on/off switch, which I'm not too hot about having to install. Is there a way to hook the amplifier remote power lead(blue wire) on the Empeg to that unit so that the FM modulator is "automagically" on whenever the Empeg is in use? According to the manufacturers spec, the unit draws 200ma in use, and the amp line is rated at 1amp, so it should be fine. My only question is - is the amp power on signal a constant-on - hot when the empeg is running?
Thanks again!