I know this has been touched on time and time again but I just had a couple simple questions. First off is what kind of check valve should I use, where to buy it or part number and where to source vacuum. I am guessing most of you went to the aluminum block on top of the intake that has the extra port so you can use it for vacuum brakes? That seems to be logical to just do that but if theres a good way to save the 50.00 Im all ears but I dont want to sacrifice a good install. Im guessing gm finally figured out that you could use vacuum brakes on a turbo car because the tta has vacuum brakes. From what Ive gathered I have most of the needed parts. Ive just recieved a g body brake pedal, master cylinder and a brake booster, Im doing a low buck junk yard swap. It all looks straight forward. Any snags I might run into? Ive already pulled the drivers seat and Im going to start on removing the powermaster in just a few.