Another seeker for Brake Coversion info

Hey outthere, I really need some solid input on what I'm about to get done on my 68 dodge dart gt.
The car has 14 inch rims, 4 inch bolt pattern, 10 inch drums with the original rallye wheels.
I purchased a disc brake conversion kit from scarebird brakes for the front only.
I know that I will have to purchase a tamdum master cylinder and proportioning valve from the local auto parts store.

My concern is: Is there anything else that Iam missing here?

ANY help is very much appreciated. I have read up on the manual written by Tom Condran and some pretty helpful stuff from the Mopar page. Thanks:read2: