great job. Believe me, you say never again and you will end up having to do it a couple more times, happened to me. I am glad to see some real numbers, guess my butt dyno hadnt lied to me. the torque curve also looks a lot better. enjoy the mod. I am really curious though as to how you did it w/o pulling the mount. Also i amsure if you go in from above you should be able to get the top nut, but what I did was full torque down the shorty header and then do the long one.
all in all glad it worked out for you.