hey guys im a new reg here lol...im working on my 66 gmc custom cab truck,,jus bought a new dual master cylinder,,do i need to replace the front lines or wut fur the dual cylinder? these trucks had power brakes but not sure if it wuz a dual or single master cylinder ,,i installed a 350/350 into it from a 72 truck and found a driveline outta a early 90's suburban..pretty funny but works!...anywho i will have much more questions later on and more photos thanxxx fur any help...