WOT Junkie and avid corn burner
Join Date: Jul 2008
Location: Virginia Beach, VA
Y'all are making this too complicated.
OP, if I were you, I'd just bolt on a centrifugal SC like a Vortech. Also, use a MAF. The factory system can and has been tuned more than sufficiently to handle what you want to do with the car. There are bigger and better MAF sensors out there now as compared to before. I know at least one member here who has been doing it successfully on a 500+ RWHP 5.0L Thunderbird that's running in the 10's for the 1/4 mile.
Michael M. ASE P2 Automobile Parts Specialist.
1996 Thunderbird LX. Gone, but not forgotten Oct 1995-March 24 2016 Trick Flow headded, E85 guzzling beast.
1985 Mustang GT. modified stock Holley 4180C, Weiand Street Warrior intake manifold, equal length headers, true dual exhaust, 5 speed, 3.55:1 8.8'' rear end, Ford Racing 10.5" clutch.
1998 Mustang GT premium. Trans Go shift kit, Bassani catted x-pipe, PI heads, cams, intake swap, Accufab elbow, SCT Xcal 4 tune, Eibach Pro-kit, Maximum Motorsports Caster/camber plates, fat tires. Banging audio system.