The trans tunnel most likely will only need the center seem flattened to clear the 727. That's all I needed to do. Not sure on the pan, I used a race pan with a tube through it for the drag link. Headers will need to be fenderwell. You can cut out the firewall area behind the front wheels and build a box for the header tubes to gain turning radius, but you have to bild custom headers If you don't and try and run four tube headers, tire turning radius is severely reduced. You will also need to move the passenger side upper shock mount, to make room for the center two header tubes. Your best bet is to dump the 440 idea and go 400 with standard exhaust port type heads to gain all the room you can. This is a tough swap, using a 440. If I ever do another early A/ bigblock street car, I will set it up with a pinto or mustang II front end to get room for everything. It will take some fabrication skills, but that is the best way to go.
