Yeah I agree with you, I have passed cars before with 36" long patches mostly because I really dont want to fix the line in the first place. I thought he was talking about going front to back with rubber hose… yeah thats different.
With the subframe dropped it should be a hell of a lot easier, now you just have to worry about corroded fittings. I suggest using a tube bender for the 5/16" fuel lines (you can get it cheap at a can-tire or princess auto) because if you kink that line its the biggest piss off ever. For the brake lines its 3/16" I just bend these ones with my hands because brake lines tend to be a lot more easy to bend and less likely to kink.
But yeah totally do it when the subframe is dropped, the biggest pain in the ass is getting the fuel lines bent around the subframe.