Correct, this is for split port 3.8L/4.2L cars and trucks. (Mustang, Windstar, F150)
The 2 1/2" hood depends on who makes that hood, and which upper intake you use.
The cowl height is measured at the back, and the high point is the blower snout up front. My R hood works fine, but some of the other 2 1/2" cowls have needed to be adjusted for.
**All hoods will need to be trimmed at the back (along the firewall) to clear the inlet plenum (between the throttle body and the blower itself). **
This gives you an idea of how high the snout sticks up:
With the Mach 1 hood:
Derrick's car to show not all cowls have the same rise to them:
Jon's car to show a hole cut in the cowl, then covered with a scoop. Jon is runnig the taller Super Six intake.
Stock hood cut to fit the Super Six intake:
Tom's is a similar height to what the MySteed Performance kit offers and is using the stock hood.
I'll work at getting more pics up soon.