I picked up a Power Brake booster and Master Cylinder today, it came off a 93 Sidekick, suppose to be almost the same as the Geo Metro one, I'm going to see if it'll fit on my 73, so I'll take some pictures as I go. It's amazing how small these things are.
Dave I have done the swap. You will have to drill 4 new holes for the new booster so that everything lines up and space it from the firewall. Pretty easy I did it in about 2-3 hours. All I have to do is the brake lines and adjustable prop valve. I also used the maverick brake light switch & Rod & adapted it to the geo Rod using a Union. Had to to some thread tapping. Pretty basic wrenching. Good Luck!!
Just a note you may have to change the brake light switch most manual switches are differnt from the power brake ones. The power brake light switch has a lighter spring so it will activate with less foot pressure which ussually occures with power assist. I had this problem on my Mustang when I switched to power brakes.
