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Old 01-21-2018, 11:47 AM   #1
Flubyu
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LS and stock Tank

Does anyone have a parts list for what’s need to modify the stock tank in my 71 C10 to work with my 5.3? It’s either this or going the Wrangler tank route but I fell this may be easier and cheaper? Thoughts?
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Old 01-21-2018, 12:24 PM   #2
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Re: LS and stock Tank

my 1st recommendation is to get the tank outta the cab...but that's a me thing..if you want to keep the stock tank you can use a walbro 255 inline pump with a vett filter/reg...you will need a return line on the tank...if your wanting the pump in the tank I'm not sure what you need..
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Old 01-21-2018, 12:51 PM   #3
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Re: LS and stock Tank

Depending on how much you plan to drive the truck, the Wrangler tank may be the better way to go. Electric fuel pumps are designed to push fuel, not pull it, so having the pump in the tank is a far more reliable option. There will be people who say a frame mounted pump works fine for them, but then there will be a lot of people who say their frame mounted pump only lasted 5k miles or so. The problem it the pump isn't being cooled by being submerged in fuel like an in tank pump, then add to that its being asked to do a job it wasn't designed to do, suck the fuel up and out of the tank which is a good 2 1/2 feet before it gets to the pump. True, there is a syphoning effect once the fuel starts moving, but that still doesn't usually help in the long haul. I have a frame mounted Walbro255 on my truck, but I also have a sumped fuel tank, and the fuel comes out the bottom of the tank, directly into a pre-filter then into the pump. It's worked flawlessly for the last 33k miles, but it is a mess to try and clean the pre-filter which I have only done once, at about the 10k mile mark, and was shocked at the amount of trash that was in it, even after I had thoroughly cleaned the tank prior to putting any fuel in it. Just some food for thought....
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Old 01-21-2018, 09:22 PM   #4
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Re: LS and stock Tank

I was thinking of having the feed line at the bottom of the tank and have the return fuel use the original feed hose at the top. What’s the best way to get the fuel fumes out of the tank before cutting and welding on it? Is it possible? Not sure if my donor engine is a return or return less fuel rail? It’s out of an 04 Yukon.
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Old 01-21-2018, 09:31 PM   #5
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Re: LS and stock Tank

lots and lots of soap and water..a buddy of mine has converted several tanks...he uses soapy water to clean and then puts a nitrogen purge on the tank while welding...
either way the rails are on your engine if you go external pump you'll need a return fitting....if its a retrun rail you can cap it off with -an fittings if you use the vett filter/reg...the vett f-r will return to the tank..
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Old 01-22-2018, 07:01 AM   #6
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Re: LS and stock Tank

I washed my tank out with dawn dish soap and a lot of water until it didnt smell like gas any more. If youre going to do it, do it at your own risk, because anything can happen and I dont want to be liable for it blowing up on you!

As for the lines, you can use the original feed line on the sender for the return, that's the way mine is run and it works perfectly. A 2004 engine could be either return or returnless. If its a return rail, just skip the expensive Corvette filter and just run a cheap EFI rated filter and run the return line back to the tank. The vacuum sourced fuel pressure regulator on the rail is actually better than the set regulator in the 'vette filter IMO. But if you do have a returnless then you will meed the Corvette filter, but dont skimp on a cheap one, get either a Wix or AC Delco, the cheap house brand filters at most auto parts stores are junk and I've seen many bad straight out of the box.
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Old 01-22-2018, 10:48 AM   #7
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Re: LS and stock Tank

If relocating the tank is an option, I've seen guys use an '87 blazer tank and fuel sending unit. Because it's for a fuel injected vehicle, the tank has a built in pan and the fuel sending unit has a return. Keep in mind the stock in-tank fuel pump would have to be upgraded but it's a simple bolt in. There are a couple of guys running this set up with '96 5.7 vortec AC Delco fuel pumps with zero issues.
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Old 01-23-2018, 01:04 PM   #8
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Re: LS and stock Tank

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If relocating the tank is an option, I've seen guys use an '87 blazer tank and fuel sending unit. Because it's for a fuel injected vehicle, the tank has a built in pan and the fuel sending unit has a return. Keep in mind the stock in-tank fuel pump would have to be upgraded but it's a simple bolt in. There are a couple of guys running this set up with '96 5.7 vortec AC Delco fuel pumps with zero issues.
Does the 87 sender work with stock fuel gauge?
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Old 01-23-2018, 04:42 PM   #9
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Re: LS and stock Tank

Yes, I believe it does.
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Old 01-23-2018, 11:41 PM   #10
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Re: LS and stock Tank

I have the sending unit with an added return and pump that I ran with my LS until I moved tank. Worked fine with the Vett style filter. All Yours for $50 plus shipping if interested
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Old 01-23-2018, 11:53 PM   #11
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Re: LS and stock Tank

Any issues running that setup? Pics? May be interested pending more info.
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Old 01-23-2018, 11:56 PM   #12
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Re: LS and stock Tank

Quote:
Originally Posted by Flubyu View Post
Any issues running that setup? Pics? May be interested pending more info.
No problems at all. I just updated post with pic and added the pump, wasn't sure I still had it.
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Old 01-24-2018, 12:16 AM   #13
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Re: LS and stock Tank

Does this sender and pump have an type fittings or what type? Any issues with the pump as far as pulling fuel up the sender and thru the pump rather than pushing? Wondered if a second pump was a good idea if fuel was being pulled from the tank rather than a gravity feed.
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Old 01-24-2018, 01:10 AM   #14
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Re: LS and stock Tank

Sold
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Old 01-24-2018, 01:14 AM   #15
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Re: LS and stock Tank

Wow. Ok..
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Old 01-24-2018, 02:05 AM   #16
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Re: LS and stock Tank

Quote:
Originally Posted by Flubyu View Post
Wow. Ok..
Wow sorry, I just realized you started this post. I hate to renig on a deal but I kind of feel I owe you. Tork you good with this if fyublu wants this????
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Old 01-24-2018, 09:10 AM   #17
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Re: LS and stock Tank

Let me know either in this thread or via PM. Thank you.
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Old 01-24-2018, 02:40 PM   #18
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Re: LS and stock Tank

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Originally Posted by Flubyu View Post
Let me know either in this thread or via PM. Thank you.
Talked to other buyer. He will step back.
Yours for $50 plus shipping if you want it other wise I will go back to the other deal

Sorry for the F up but I want to be fair
Steve
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2013 GMC PU, Oldest Son
71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son
2019 GMC Diesil Dually. Youngest Son
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Old 01-24-2018, 02:57 PM   #19
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Re: LS and stock Tank

I’ll take it, what’s your PayPal?
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Old 01-24-2018, 03:34 PM   #20
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Re: LS and stock Tank

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Originally Posted by Flubyu View Post
I’ll take it, what’s your PayPal?
PM sent
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2013 GMC PU, Oldest Son
71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son
2019 GMC Diesil Dually. Youngest Son
2017 Toyota SUV Daughters car
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Old 02-04-2018, 12:16 AM   #21
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Re: LS and stock Tank

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Originally Posted by Flubyu View Post
I’ll take it, what’s your PayPal?
Have not heard from you and have Not seen payment. I sent PM giving you 3 days to respond. Your time is up, I'll be moving on
Thanks
Steve

Tork
You still interested??
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1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN
2013 GMC PU, Oldest Son
71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son
2019 GMC Diesil Dually. Youngest Son
2017 Toyota SUV Daughters car
2018 Traverse , Wife’s Ride
Pittsburg Ca
94565
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Old 02-04-2018, 12:24 AM   #22
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Re: LS and stock Tank

Not sure why I hadn’t been notified of a PM. I sent payment on 1/27.
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Old 01-24-2018, 10:17 PM   #23
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Re: LS and stock Tank

Once again SOLD
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2013 GMC PU, Oldest Son
71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son
2019 GMC Diesil Dually. Youngest Son
2017 Toyota SUV Daughters car
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Old 02-07-2018, 11:41 AM   #24
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Re: LS and stock Tank

PM replied. As stated in PM please dispose of the check if time runs out on your end. As I already stated, I mailed it on 1/27. Not sure where this has landed, but I sure hopes it finds you in California!
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Old 02-10-2018, 09:55 PM   #25
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Re: LS and stock Tank

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Originally Posted by Flubyu View Post
PM replied. As stated in PM please dispose of the check if time runs out on your end. As I already stated, I mailed it on 1/27. Not sure where this has landed, but I sure hopes it finds you in California!
Check arrived post marked 2/7. Will send out ASAP
Thanks
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1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN
2013 GMC PU, Oldest Son
71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son
2019 GMC Diesil Dually. Youngest Son
2017 Toyota SUV Daughters car
2018 Traverse , Wife’s Ride
Pittsburg Ca
94565
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