The 9s up front i would use 275-40s I think thats the stock size on a cobra and if they fit a cobra stock then no problem on a 99. if your going to use a 245s i would get 8" rims. i have 8s on the front with 245-45s and 9s on the rear with 275-40s and they are all the same height. the chin spoiler is held on with some plastic pushins. should be able to get them at ford. here is a place on ebay for 60 plus 15 shipping and it comes with all the hardware http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=33638&item=7944579478&rd=1&ssPageName=WDVW the side scoops and hood scoop will fit. I just bought a hood scoop for my 99.
mob said:
There's a ton more room on the 99+ mustangs than Foxes. Guys regularly run 10.5" rims out back. 315's are about the max you can go, and something there is a bit of rubbing on lowered cars.
mob said:
Order the chin spoiler from www.mustangtuning.com along with the mach 1 grill delete. he chin spoiler is like $60 and comes with the hardware. By the way, all the hardware is are 1/4 black nylon push pins you can get from autozone. If you want to know what they look like, the stock honeycomb grill is held on by a couple on the top. They look like the have screw heads.
The side and hood scoops will also fit on the 99-00 cars. The side scoops come on all 01+ Mach's GT's and Cobras. The V6's got the 99-00 side scoop while the bulliitt gets s scoop delete
Be very carefull. I have a 99 GT LE with the stock wheels (17X8) and tires (245-45) up front. I put in a Roush sway bar, which is about 1/8" larger in diameter than the stock unit and if I go hard over with the wheel there isn't more than 1/16" clearance between the tire and sway bar. If you're going to use larger wheels and tires up front, make sure you have enough offset so everything clears. Out back has plenty of room for wide boots.
Len
Len