4V for sure. I prefer the 99/01 cobra, but the mach is also great. Theres someone on here making 412rwhp N/A on a 4v.

You can spank 90% of the blown 2v's around with that kinda power.

 

well theres a performance shop by me and the owner has 2 automatic stangs.... a mach 1 and a 06 GT.... both are doing 10.5 and completely street legal and look stock as hell.... I just want to go in and say do what you did and be done with it..... I was going the bowtie route till I saw those stangs... here I will post some links

heres his mach one with a best of 10.5
http://www.alternativeauto.com/misc/...ct_dec-05.html

heres his 06 with 20" rims with a 10.9 so far
http://www.alternativeauto.com/misc/...te-122106.html