The EGR is different on the newer Cougars, which these were initially designed for. It's not a balls up.
I would think you could adapt the stock cat flage to fit the the bolt flange easilly.
2000 SVT Turbo 295hp/269ftlb@12psi
#1 for Bendix Brakes Kits!
Knuckles rebuilt w/new bearings $55
AUSSIE ENDLINKS $70
Gutted pre-cats $80/set
A lack of planning on your part does not constitute an emergency on mine!