To keep 440-1 top end or not

I did manage to get tti headers in my demon with the same motor set up as you have but there was a few dents needed. the best way is to remove the torsion bars and go coil-overs and rack steering. tti's etc will fit right in or you could build your own like I did when I went with the supercharger. check out some of my other posts on how I did it.