So I was wondering, how do I figure out how long my brake lines need to be?

 

Great question! I'd like to know as well before I rip mine out

 

Find somewhere to fully flex your Jeep with the front sway bar disconnected. Have a spotter watch your brake lines as you slowly start flexing on each wheel until reaching the bump stop or before if the line starts to get tight/stretch. You can also do it with your Jeep on jack stands and use a floor jack under each side of the front and rear axles and flex it that way to see how far you can go. Once stretched measure from the bottom of the bump stop to where the bump stop hits then add that to your stock brake line length. That should give you a good idea.

 

Not trying to thread jack... but along the same lines...

I'm installing a 2.5 TF BB (Brake line extension brackets as well) on Monday along with the TF Discos. Would I have any problems with my stock brake lines when I disconnect?

(Sahara never disco'd)