Here is how I set up my fuel system for my current LSx Swap on my '85 GMC. I will be using a return style system. The engine is from a 2000 5.3 from a GMC truck. The engine is stock except for headers and a cold air intake.
I bought a new '87 tank and sender from Spectra Premium from Amazon.com.
Tank, 16gal (SWB) PN GM11B
Sender, Driver side tank: #FG05M -OR- Passenger side tank: #FG05N
For the pump I purchased a Bosch #69225 (same as an ACDelco EP381) from Rockauto.com. The kit includes clamps, fuel line, isolator, wiring pigtail and clamps for install.
I also purchased a new Strainer, Spectra Premium #STR01 (required for Fuel Pump Warranty) from Rockauto.com. I did not know the sender kit had one already with it...oh well, it was just a couple of bucks, now I have a spare...
The fittings I used are:
Jegs 3/8” tube to -6 Male AN Fitting (#100551)
Earl’s 5/16” tube to -6 Male AN Fitting (#165056)
I used one Earl’s and one Jegs because of cost, I saved a few bucks & Jegs did not have the 5/16” fitting (the Earl’s 3/8” tube to -6 Male AN Fitting is PN#165006, if you have to have both fittings the same brand). I got these thru Amazon.com.
Here are pictures of the components:
Sender:
Fuel Pump, Strainer, and Fittings:
