Do I need new brake lines?

[cpthowdy1369]

Hey guys, I switching out my rear end to an 8 3/4 and I need to know if the brake lines and t block from my 7 1/4 will fit. do I need to just get new lines? thanks for your help

 

[Old_Demon]

I would think it would probably be the same. When I bought new lines for my Demon I'm restoring I didn't have to specify which rear I had.