Here are 2 threads that you may find helpful. I pulled my lines w/o cutting any or removing the intake.
http://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/1047852-fuel-line-kits-stainless-steel-teflon-225-495-a.html
http://forums.pelicanparts.com/porsche-911-technical-forum/1030675-replacing-engine-fuel-lines-88-911-a.html
I did remove the airbox and TB, to make things easier to get to in the back. Taking those out is a 10 minute job and about the same to replace.
Josh