lookin for advice

hey I got the interior ripped out of my stang due to a mold/mildew problem. Found my seam sealer in the passenger compartment to be dry rotted so i set upon scraping it out. While i sit in there a scaping away i was thinking about future projects stereo, elect hatch realease and the such i figure now is the time to run the wires but how should i do it safely. the best i came up with was get big 1/2 or so fuel line drill a hole in the hump under the dash run it under the car then bring it in to the spare tire well (perfect place for an amp) Braze both ends so it dont leak and run string thru it to pull wire. whatcha think trick or to much work?:scratchchin