Squarebody/LS Fuel pump options...

[ShortHaul]

I know this topic has been hashed over many a time, but things keep changing in the LS swap world, and the "best" option out there today may not be the same one that was popular 5 years ago. Hear me out, and weigh in on the subject if you have any firsthand knowledge.

I am in the process of swapping a 2002 LQ4 6.0L into my '75 C20. The 6.0 is stock, and has the return style fuel rail. My stock fuel tanks are in good condition.

I am looking for insight as to the best option for my setup. I'll list the possible options as I know them...

A. Holley In Tank EFI Module. $383.xx free shipping. In stock now at Holley. Swaps right into place on existing fuel tank. Sender and pump together in one unit, no need for EFI tank. Even has wiring pigtail with proper ohms for stock gauge (which I plan to run) The only hiccup I have is this module is a RETURNLESS style. Meaning its internally regulated and does not require a return line. My current fuel rail is a return style. Also If I want to run dual tanks, the Pollock EFI tank switch unit has return lines on it as well..

-Possible workaround- Run a return line from fuel rail to tank, drill a hole in tank and add return fitting...
OR
-Swap out fuel rail for a returnless style (approx $115)

https://www.holley.com/products/fuel...s/parts/12-308

B. Buy 2 new EFI fuel tanks (1987+ Spectra Part #GM1C) Amazon currently has the cheapest deal, $102.xx with free shipping. Add Spectra fuel sending unit $114.00 from amazon or Hot Rod Fuel Hose, add Walbro 255 pump ($60) (which nobody has in stock...) and retrofit that way. Total cost per side approx $276.00. Cheaper than the Holley route by about $100. Downside is I can't seem to find the correct Walbro 255 lph pumps in stock anywhere.

C. Tanks Inc New tank system with GPA-4 in tank pump. Approx $630 (tank 310, pump 220 sender 40) plus 50 for shipping...

D. Holley Sniper fuel system (comes with tank, sender and pump, basically like the tanks inc setup) $650 backordered till the end of the month.

Option A is the only one I can find that's currently in stock... but poses the issue of what to do with the return line. Also have read that switching the fuel rail to returnless style will make engine run poorly until tuned. (Has start-up tune in it now, plan to do a street tune after all is said and done)

All others are currently backordered at least a few weeks or unavailable.

Anybody have some advice for me? Thanks in advance.