Rear Disc conversion questions..., ??? Options

[Kwanza]

When doing the swap, is it necessary to swap over all of the brake lines from the GT to the ST or can I just use the exsisting lines, valves, etc, or Do I need to swap over everything? I am asking this because some disc and drum brake set-ups typically use different fluid pressures and stuff, so I was wondering if there is any difference between the celica drums lines/valves, and the disc lines/valves.


Thanks,

and yes, I did read the "how to" but that doesn't answer my question...