BBC in 72 GMC Burb - exhaust help~

[72GMC-Burb]

I have pics of my burb posted here and appreciate all of the insight I get from reading other posts and seeing the pic's - great work everyone!! I am wondering if anyone else has done the move that I have....2" forward so the engine would clear the firewall? If so, how do you work in headers without having to give up a left arm and leg?? i had to notch the frame to get it all to clear where it tapers up by the exhaust - and - now I would love to have better looking pipes if anyone can steer me in the right direction. Please and thanks