The units are externally the same from early 80's , 90's and I think the 2000's. The internal bore is larger on the heavier trucks so these units generate a little more power. I have used the 1/2 ton and the 1 ton and find little difference but if give the chance I choose the larger truck/van.
The plate that comes with the units fits our firewall without drilling new holes. The center hole needs slight enlargement but a file will do.
The plate should be removed and rotated 180 degrees to put the line underneath for a neater appearance.
To rotate the plate, remove the large nut, pull the plate off, file the little locating tit off and 180 degrees from it take a 1/2 round file and file a 1/4 inch notch but only 1/8th of a inch deep. Take a 1/4 in bolt and with a hawksaw cut about 3/16 off the end. Use this little 3/16 sliver to drop into the knotch you filed and into the groove in the rotated hydraboost. Install the nut and the unit is locked in this new position .
Remove the studs from the plate and use them in the firewall. Install the 4 studs from under the dash in the existing holes and pull them through and tight with an oversize nut as a spacer and the proper METRIC nut.
The linkage is 3/8th and I don't remember fine or coarse. Anyway cut the shaft off so the remander equals the stock unit and run the proper die over the shaft. Thread as far as possible for lots of adjustment and then use the stock clevis.
The unit slides over the studs and is easy to bolt to the firewall. No more laying under the dash except to hook up the pedal]
Master cylinders. The non power master needs a deeper rod but the power master works fine and bolts directly to the hydraboost. I filled in the hole in my non power master and used it.
For lines I used the russel flex stainless lines and put my own red fittings on it.
ONe line from the pump to the large fitting on the hydraboost, from the smaller fitting to the power steering control valve and the very smalll slip on line return to the power steering pump. Tee the return line.
Hope this covers most things.