Wait a second...
I re-read your post and it was about the 281 "SC" (Supercharged) model...
Here's all the poopsky on that model:
Type
4.6L, 3V, SOHC V-8
Bore and Stroke
3.55 x 3.54 in.
Displacement 4.6 liters, 281 cu in.
Accessory Pulleys Saleen Underdrive Pulleys
Exhaust System...