I got the hydroboost swap done this weekend. Overall it wasn't bad at all. The biggest problem I ran in to was the feed line from the PS pump to the booster, which I will elaborate more down the line. Going off of the GMT400 hydroboost swap "sticky" done by Draggin (which is very good) I set off getting all the proper parts I needed. I was lucky and got everything off a 97 1 ton. This included the booster, master cylinder, all lines (3), and the brake pedal. The only difference between what I did and what Draggin did was I swapped in a PS pump with 2 return lines instead of 1.
Ok, I'm not going to get into swapping the pumps. That's fairly straight forward and if you want to see a "how to" do a search for power steering pump replacement. There's a pretty good write-up on it.
Got my old pump off and the new one sitting next to it with the mounting bracket swapped over. Take a close look at where the feed line goes into the bottom left of both pumps. You'll notice they are different. The stock pump has EVO (electronic variable oriface) and the new one doesn't. At first I didn't care because I was going to either delete it all together or just unplug the wires going to the connector.
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Booster and MC installed. I didn't get any pics of the interior where it bolts through the firewall or swapping the pedals out.
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Here's where I ran into a problem. You can see where the inlet is for the feed line, and the line itself. The inlet faces the rear of the truck. The line faces 90 degrees from where it needs to be in order to attach it to the pump. I believe the donor truck had EVO because of how the line sits, but I'm not sure because the entire engine was out of it when I pulled everything. In the second pic you can see the EVO connected to the old pump, and that it faces towards the front of the truck when it's installed (where I need it). This line was a stock GM line. The feed line that is shown in post #2 from O'Reilly's is the same line as well. So it won't work either.
IMO, unless someone knows something I don't; when you do this swap AND you swap pumps to a hydroboost pump you either
A. Must re-use the EVO connector from your truck or
B. Get the end of the line re-made so that it faces the front of the truck
Just my .02
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