Found some other resources out there for this.

I've picked up a 95 Astro unit including the 1-1/4" master cylinder and am in the process of figuring out my own setup thanks to the trail blazing spirit of those that have figure out all the tough details.

I have a 75 Dart originally equipped with vac power brakes. Originaly disc/drub and now converted to disc disc thanks to Dr Diff's cobra conversion. Seems to be the best way for me to get some good power assist to help make the car stop as it should.

http://www.jeepforum.com/forum/showthread.php?p=6728392

http://67-72chevytrucks.com/vboard/showthread.php?t=202888

http://www.hotrodders.com/forum/hydroboost-plumbing-93106.html

http://classicbroncos.com/forums/archive/index.php?t-92316.html

http://forum.ih8mud.com/60-series-wagons/270505-toyota-vs-gm-master-cylinders.html

I know this is some other A-body owner out there that has made the conversion and I'd sure like to know your approach to mounting the thing and which master cylinder you went with.

Greg