Your pump is a stock EB Thompson pump. The Thompson pump was used on millions of Ford cars over the years including classic Mustangs and full size pickups.
Wherever you're ordering that hydroboost kit from, should provide a parts list and what the fittings are for. Are you supposed to just guess what fitting goes where? If you have a parts and application list/instructions from the seller or manufacturer, that should answer most of your questions.
My Bronco was driving very poorly and swore to fix the steering and brakes. They were both power setups. I replaced a stock power 6 turn, lock to lock gearbox with a Borgeson 3.75 turn box. Wow, what a difference and the steering was the root of all my problems. I bought their hose set up and it has the 2 fittings for the gearbox that they charge 25.00 alone for.
I bought the hydroboost before I installed and tested the steering and its the rave for the additional weight of 35 inch tires so I got it. I didnt purchase their install kit because I thought the price point was high, I just showed a picture for reference as there is no reducers in the kit. It turns out after getting all the fittings and hoses that it really isnt that far out of line and would be a big time saver just to put it in the cart.
I bought the line drops from the master to the proportioning valve. These are high quality braided lines that are flexible for routing.
I can tell what all the fittings are and know what sizes I need. The Borgeson fittings that are coming out of the gearbox are -6. I CANT GET THAT Fitting OUT OF THE BACK OF THE POWER STEERING PUMP which is 5/8-18 Inverted flare. I ordered what I thought was the correct fitting on Tuesday and it came today. Only the nut turns and the fitting is well giving me fits. I double nutted it and made a sleeve out of brass that I could clamp on to and its not budging. Its different than the ones that come in the kit and a person never knows how it is put together or how someone may fix something....
I was able to hook up my high pressure Borgeson hose tonight (barely, what a stroke of luck) and Im gonna test my old trusty power steering pump to see if she can handle both the gearbox and hydroboost. The reducer is on the list if she can handle it. Other wise im gonna have to upgrade the pump and brackets.
Picture of temporary setup for testing the power steering pump and hydroboost.