I have a 61 Chevy C-10 with a hot rod 350 engine, it has the orginal drum brakes and I want to convert the front brakes to power disc brakes. I have 2 questions about the conversion. 1 - I found one conversion kit using the exsisting spindles and the others use a 2 1/2" drop spindle - what is the difference in the spindles and which would be the best? 2 - Do I need to change the brake lines or can I use the orginal brake lines?