I have plenty of housing left over from before just no long cable, so that is not an issue. And it's just for the shifter not the brakes. I already cut the cable and made new housing for the front that works and will just keep the housing on the back in place. I will crimp the cable in the middle where I already cut and where there is no housing just cable, make it as tight as possible and then adjust the rear deraullieur as needed. So basically it will be two splices inside a single copper tube (unless anyone else has better idea for equip I can use available at home depot). Indexed shifting should still be fine because there should not be any play at all in the crimp if anything it will be more solid not less.