ridah are your lines venting into the engine or are they closed off? I've heard that venting into engine bay is fine, cause it's being vented, but if they're closed then a vented gas cap is needed to give the gas fumes somewhere to go on a hot day. You probably knew that already though.
Remove, and block off EGR
Remove, and block off charcoal canister
Remove powersteering (and convert to Mustang Steering Rack)
Remove belt driven fan and replace with Electric fans
Just some ideas for making more space in the engine bay... and I always wondered if someone ever put an electric waterpump on a 7MGTE, and if it's a good or bad idea.. that'd free up alot of space, as well as some throttle response.