Being the type of person who likes to just prepare for what I feel is going to be eminent (in due time), I began building up a new fuel pump assembly. I'd bought a used complete fuel pump assembly from Ebay for $85 shipped to just get started, and it has worked out pretty sweet so far as the OE part can be hacked on with little effort to get the job done.
Bought a Walbro/TI 190LPH High Pressure fuel pump with harness and sock:
Pump $60 shipped
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Harness $15 shipped
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Sock $15 shipped
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(I'd picked the 190LPH HP for its lower amperage and it should be enough for my ultimate goals)
Bought these Sumitomo MT090 terminal pins for the fuel pump to bulkhead OE connector, seems to be a common terminal and reasonable to have extras laying around anyway ($15 shipped):
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(The walbro harness leads work great but are a little bit tight pushing into the connector)
This tool was awesome to crimp the above terminals just like OE ($23 shipped):
SN-28B Ratchet Wire Crimper Tool - Crimp an Assortment of Open Barrel Terminal/Connector; Crimpers Include Practice 310pc 2.54mm Connector Kit by MG - - Amazon.com
Also purchased this Gates submersible fuel hose (will need well less than a foot) to connect the pump and return ($30 shipped):
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The original pump housing needs its top cut off, or hacked on to your liking to fit the pump. The way I went about it was that firstly I'd used a hole saw to cut out the top, but the pump needed to push up higher for proper sock clearance so I cut off the top next rather than sanding the entire insides out. Glad I did as at this point the OE fuel filter is exposed and can be removed, providing a surrounding "bucket" fuel can be dumped back into via the return. I'd taken dremel cut off wheels to do most of the work, some cartridge roll sanding into the pump holder cylinder up top to make the Walbro push all the way through. When said and done the pump squeezes very nicely into position and honestly seems to be a perfect interference fit, but I have an Oetiker clamp on the way that will hold around the base plastic to ensure the pumps position is held in place.
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Probably have no more than 30 minutes to the hack work above, but a hell a lot more into finding the bits and pieces to get this far. The plan from here is to plant the return line into the surrounding bucket (where the original filter resided), so the pump always is cooled internally and externally as long as there is fuel the sock is able to pick up anyway, and going to run an external filter on the top side of the tank. Still waiting on the bulkhead adapters and fuel line, should only be another few moments into it to complete thereafter. Will prob still have close to $300 into the assembly alone when said and done, so not like it was ultra cheap, but will have some OE like characteristics retained and I feel will be a solid drop-in upgrade.
I've also bought a used sidewinder fuel rail/injectors/fuel pressure regulator assembly for $130 shipped. I believe these injectors are ~500cc, but will likely send them off for cleaning and flow measurements to confirm. I can not seem to find anything conclusive as to their size NOR even the size of the YXZ injectors (~400cc?). The plan is to use the Sidewinders Fuel Pressure Regular with the new pump setup, returning its fuel back into the OE fuel connection and using the new bulkhead adapter parts for the fuel feed.