Fuel tank identification??

L92 OLDS 2

Not-quite-so-new-guy
Apr 2, 2023
23
41
13
SW Michigan
Hello Gents.
I'm trying to identify what fuel tank I have in my '86 442. This car was built by my late brother and I'm trying to understand what components he used.
The car has an LS3/4L80E swap with all the Holley goodies.
I'm thinking it's the Spectrum GM309A? You can see parts of the installed Racetronix Pump wiring harness here too. Thanks in advance.
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Both of mine are powder-coated the one in the picture above is a few years old. and the one i bought last year for $50 new on eBay is the same coating i only bought the second tank because it was so cheap. i even have the original box for the second tank and it has no markings.
 
Thanks all for the feedback - great info here.
The tank needs to be EFI due to the known installed Walbro in-tank pump on the sender. I'll have to see if I can get a view down the filler neck, maybe with my inspection camera.
I want to know for my own info, but also to help my Brother who is now working on the same LS3 swap on his '86.
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You can put a Walbro in any gbody tank It's best to do it with a baffled tank. you can fit 2 walbro 450 in a gbody baffled tank i been running it for almost 2 years now . Just a tip, they are hungry pumps, so use a heavy wire to feed them.
 
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Hello Gents -
After some more research on what tank I do have, I've confirmed that it's a Spectra Premium GM3C that does not include a filler neck. My filler neck is OE from a doner tank and is JB Welded into the GM3C.
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Back when my brother (L92 OLDS) did this LS swap in 2016, there were not as many tank options as there are now, so this is what he did for a proper fit.

Thanks again for all the helpful feedback. I'm learning a lot about this 30+ year G-Body build as time goes by.
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