Headers for it might be a pita. I know a lot of mustang sites if theres anything you can't find or want to know if its made just ask.

Actually I dont think it will be bad at all, Im sure they make some tight tuck headers. There will be more room with the LM7/mustangII setup than with the 302/stock front suspension.
http://i264.photobucket.com/albums/i...g/IMGP2904.jpg
The engine needs to move about 1-2 inches closer to the framerail (I couldnt get the freaking engine hoist to move it over any farther) But even with that I believe I will still have plently of clearence on both sides. I believe my main problems will be with the transmission and the oil pan, depending on where the transmission pushes the engine. (Dont really want to mess with the firewall)