A turbo would fit fairly easy on an atx.... zetec that is. Turbo goes in front of engine and there's enough room for rest of piping above tranny and especially if you move the battery to the trunk.
98.5 SVT
91 Escort GT (almost sold)
96 ATX Zetec (i brake to watch you swerve)
FS: SVT rear sway bar
WTB: Very cheap beater
CEG Dragon Run - October 13-15