[rcweingart]

I have the Roush DFI engine and I put the ECU for the unit in the passenger's foot well so I didn't have a lot of room there but note, however, that it is not ventilated and most amps give off a lot of heat which, in a closed space, isn't too good for either the amp or the MSD.

I used Dynomat in the doors adjacent to where I have my speakers to keep sound from revererating in the doors even though the factory has a rubber foam pad on most of the inside door skin (but not where the speakers go). Adding insultation to the firewall and adjoing areas is a very good thing. I revised my heater plumbing and valve as well as addding a shut off valve on the other line so that the heater core is completely isolated and now my A/C blows so cold that I have to turn it down and away or I get head freeze. You might consider this in addition to the added insulation.