Beware of Centerforce, those weights on the fingers have gotten stuck for more than one person. I personally would never use it. I've had great luck with the Exedy clutches. The Mach 400 is more than fine but if you already got the Centerforce... I guess roll with it. Make sure you get a new flywheel. You can use the Coyote flywheel being an 8 bolt crank, just need to punch out the Coyote dowel pins and install the 4.6L stepped ones, they are $14 and it takes 5 minutes.
As far as the cable, if you have a BBK cable do yourself a favor and replace it with an OEM. BBK/SR/parts store cables are junk. Best quadrant/cable/adjuster setup I've used is a Max Motorsports quadrant as it mimics the feel of the stocker, OEM cable and Fiore microclick firewall adjuster.
Also stock suspension... if you mean STOCK suspension you are going to have a real hard time hitting the 11s. Machs had the bolt on subframes which are not great and the rest of the suspension is pretty much just a GT. You need to be lowered, some LCAs, good wheels/tires, steeper gears and WELD ON subframes to have a decent shot.
I know I sound like a downer and all but just letting you know what to expect. Stock suspension with a Mach is probably going to lose to a bolt on GT with a good suspension setup and properly geared in a race.
2000 Mustang GT Steeda #0048
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.