I am planning on changing to a double stage cylinder on my 63 f100. Is there anything I need to know before doing it. Is there anything in perticular for the new master cylinder. I know I have to get either a 66 or 67 to get the double stage. Does it need to say for use with front and rear drum brakes? Any other info or advice would be helpfull as I will be making my own lines(flaring them). About how much line will I need? Has anyone used stainless before? Is it hard to flare and is it really nessecary verses steel?

well it said on application that it was for front drum brakes. plus they were not using disc brakes in 67 on the f100 were they? 

one other thing the brake switch from the single stage cylinder it had two wires going to it. Do I need to put a "Y" connection on that to put that switch back on the new dual cylinder?