My hydroboost install

[rizzos442]

Just as an FYI, I did something similar to what you are doing. I used a hydroboost from a 2004 GMC 1 ton. I did all the same fab work as you are doing, only I used the master cylinder that came with the hydroboost. The bore is 1.7", so it is huge! I tapped my rod also and cut it to length.

What you will find is that you will have to flip the hydroboost upside down. Your line fittings need to be on the bottom. I will tell you why in a minute. I used a 16mm and a 18mm to - 6 straight fitting for each line on the hrdroboost. I used 90* fittings on the hydroboost and 45* on my P/S pump and tank. All lines are -6 braided SS.

OK, now here is why you must flip it upside down. Your P/S pump will not spit out enough power to use your power steering and your hydroboost at the same time. You may say, sure I do not brake and steer at the same time, but that is not the case. You have both of those lines in there as a circuit. P/S fluid must me pushed through the inlet and outlet. With the unit being as you have it, it does not work properly. I spent countless house figuring this out...then I called Paul at hydratech and he told me to flip it. After I flipped it, I was good to go. I can not believe the difference in stopping power and pedal feel. FYI, if your power steering system also has to low pressure ends, 1 on the pump and 1 on the tank, then you need a T fitting and hose coming from your hydroboost low pressure for it.