Parts list for you:
- one fuel filter tower from an '86 or older 6.9 van.
- two 3/8" barb 1/4" NPT fittings
- several feet of 3/8" hose
- one NAPA #1755 filter (it's 21 micron, flows 11-13 GPM so over 3 times what the pump is capable of, and has a 20 psi bypass valve built in)
Remove tower's fittings for the factory steel fuel lines, install barbs in their place. Spin your filter on tower loosely, put tower on intake, make sure bottom of filter clears all injector return lines, if all is good tighten tower bolts down. Connect the return line from your steering box to the fitting facing the injector pump. Connect fitting facing the fender to the PS pump's return port. Prefill the filter with whatever fluid you're using in you PS system, spin it on good and tight, fire up engine, and check fluid level in pump - it will drop slightly but not by much. Top off as needed, go have a beer or three - job is done. Obviously if you want to get fancy you can use flare fittings instead of the barbs and form your own steel lines to go with them. I used hoses cause it makes it easier to remove filter tower for accessing injector return lines and TPS without making an oily mess everywhere.
Important note: on trucks with the E4OD transmission the NAPA filter may not clear the TPS. Mine looks like it will clear by a smidgen, but then I can't get to the TPS at all without removing the tower. Changing the filter is also impossible then. My solution was 3/4" tall spacers between the filter tower and the engine intake, this lifted the filter enough to allow easy TPS access and filter changes, but not high enough to come in contact with the hood. Make sure the spacers have 3/8" ID but quite large OD, you can slide a smaller spacer into a larger one to achieve that, just make sure they're all the same height. The large OD is needed to properly support the weight of tower and filter, if you only have the regular 3/8" ID sleeves as spacers the vibrations from the engine running may crack the bottom of the filter tower. Alternatively you can stack a bunch of 3/8" flat washers together, that will achieve the same result just somewhat messier to install.
Setup was tested on my own truck first of course.
