Here is a pic of the conversion I did from a jelly jar to a dual bowl on my '65. You can get a rebuilt 1967 Mustang dual bowl MC from Autozone or just about any parts place. The kit you get from NDP with the pre-bent lines don't fit, so you have to do some re-manufacturing. I know the lines next to the MC should be coiled, but I have had absolutely no problems with my set-up. I have shoes all the way around, so can't answer anything about the proportioning valve, but it sounds like you already have one. The only thing I have is a distribution block, so don't need one. A strong suggestion to you is to replace the jelly jar with a dual bowl MC for safety reasons. I went ahead and replaced the brake lines to the front while I was at it. God knows how old those lines were, and the rubber next to the wheel looked like it was rotted. Don't forget to bench bleed the new dual MC before putting it on the car. A correction to Jim's suggestion about a new rod. You need to use the old 66 MC rod.