Converting from single master cylinder to duel ?????

Thanks,
I read threw it and it is starting to make sense to me. I need a 1967 Drum break master cylinder.

Oh and I found this Distribution block at Year One. PN BTB2 It is a reproduction of the one for 65 and 66 cars with disk breaks and a duel master cylinder. So it splits the fluid front and rear. Should really save a lot of headaches!!!!!

http://www.yearone.com/serverfiles/fbshopmain2.asp?input=BTB2&SM=1&SC=1