Doug,
Your post does not state if you run a Dana 30 or 44. I'm guessinging a D30 w/ a vinatge '68. If you do upgrade to a D44, the brake parts will fit.
A Dana 30 conversion using the Chevy spindles has worked great for me. The spindles are not cheap but worth it for the cost of tracking down salvage yard parts that may not have a true machine surface.
I also like the fact that you can go to AutoZone and purchase new calipers, lines and rotors.
I saved up my money and added the power brake booster/bracket and prop vavle at the same time. The feel of power brakes behind the wheel is worth the cost!
There is plenty of information on this conversion on this website and in Bronco Driver. Some write-ups also have the bearing and seal part numbers that you will need.
