What are my engine choices

[1 TUF AC]

if they have relaxed the emission laws then maybe I am wrong. I know a few guys that have passed emissions with stock efi 302 Windsor or on LPG but then they had to use special cat converters and a special tune to pass and once they passed then they pulled the motor out again and rebuilt it to make more horsepower and then another retune again. The point I was trying to make was that a stock LS3 FOR EXAMPLE Will pass emissions easy and has more than enough power for a cobra and you only have to put it in once and there is no for need cam swapping or anything like that. Its just a lot easier. if there was no laws I would built a crazy stroke Windsor in my AC. but it cost me twice as much to build one as strong ,reliable and powerful as a LS3. been there done that with my old Mustang. A friend of mine is actually thinking of putting a Xr6 turbo engine in a cobra it would definitely be different. And it probably will embarrass a lot of V8 Cobras at the lights is too.