LS Fuel tank/ electric fuel pump ideas/ input needed - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**WIDESIDE72** · 10-16-2019, 02:31 PM

I'm about to embark on my latest project, swapping an LS1 onto a 72 swb chassis, then installing a 70 cab and clip. I am trying line out the major issues, one of which being the fuel system. Instead of going the "cubic dollar" route, I am trying to keep it low buck. I have a fuel tank out of an 82 Suburban I parted years ago. It seem that it is similar in width to the Blazer tank I used in another 72, but deeper. My thoughts are using a sending unit out of an 87-91 (that was originally equipped with an electric fuel pump) and instead of the tbi pump, I would use a pump from a newer vehicle, perhaps the donor 02 Trans Am, or newer LS equipped pickup.

Thoughts?

Leonard1 · 10-16-2019, 02:49 PM

Just use an EP381 pump. It will fit right in the 87-91 sender.

**AussieinNC** · 10-16-2019, 05:19 PM

Check out the LSX swaps sub forum....

https://67-72chevytrucks.com/vboard/...play.php?f=206

Andy4639 · 10-16-2019, 05:41 PM

I have a 93 Suburban tank in my 71 and swapped out the pump for a LS pump when I did the motor swap from the TPI motor. Works great. Mine is 42 gallon and up inside the bed under my cover.
People flip out when they see me pumping gas but I can get right at 700 miles on a tank of gas.
I still have plenty of room inside the bed also.

prodjay10 · 10-17-2019, 12:15 AM

I’m going the Jeep Wrangler tank. The suburban tank didn’t fit between the crossmembers like I’d like. I would either have to cut the crossmembers or drop the tank down low. I didn’t want to do either.

verdell · 10-17-2019, 03:35 PM

I'm currently using a 1992 S10 Blazer 20 gallon tank along with an EP381 fuel pump and it works great. Also used a 1987 Chevy van tank before along with the EP381 pump but it hung a little lower than I wanted. Both these tanks are from throttle body vehicles so they have built in pans to prevent fuel starvation and the sending units easily accommodate the upgraded pump required to run LS applications.

**WIDESIDE72** · 11-04-2019, 03:18 PM

I figured out that the suburban tank is too big. It won't fit in between the cross members. I used a 72 blazer gas tank in the truck in my profile pic, but it was carbed. The 72 blazer tank is rectangular when viewed from above, and the suburban tank I have is square. It might work in a lwb, but mine is a swb. I contemplated using a blazer tank again, but IIRC, the newer sending unit needed for the factory style electric fuel pump wont't fit in the blazer tank (larger diameter).

**Captainfab** · 11-05-2019, 12:16 AM

Here are a couple of the few options from Tanks Inc for a EFI tank for a shortbed.

https://www.tanksinc.com/index.cfm/p...rod/prd173.htm

https://www.tanksinc.com/index.cfm/p...rod/prd249.htm

mcmlxix · 11-05-2019, 07:11 AM

If you have a good tank, use the install ring that allows you to use the OEM late model pump module...

https://www.vaporworx.com/product-ca...ounting-rings/

https://www.vaporworx.com/product/rwtak/

**WIDESIDE72** · 11-05-2019, 09:08 PM

Quote:

Originally Posted by Captainfab

Here are a couple of the few options from Tanks Inc for a EFI tank for a shortbed.

https://www.tanksinc.com/index.cfm/p...rod/prd173.htm

https://www.tanksinc.com/index.cfm/p...rod/prd249.htm

Thanks. I will look into the truck tank. It looks promising.

**WIDESIDE72** · 11-05-2019, 09:10 PM

Quote:

Originally Posted by mcmlxix

If you have a good tank, use the install ring that allows you to use the OEM late model pump module...

https://www.vaporworx.com/product-ca...ounting-rings/

https://www.vaporworx.com/product/rwtak/

Thanks. Unfortunately i dont have a tank at all but i will keep the ring in mind in case something comes up.

88Ironduke · 11-05-2019, 10:52 PM

I used an LMC gas tank (21 gallon I think) and a Speedway motors fuel pump with a sump assembly. To fit the tank in between the rails you have to cut out one of the cross rails for the steel bed just behind the rear wheels, not pleased but not a terribly big deal. When the tank is put is in place the top of the tank is really close to the bed floor. I had to recess the roof of the tank (ultimately wasn't enough but we adapt) and allow for clearance on top for the 90' -6AN fittings. It worked out really well, the process wasn't pretty but effective. PM if you would like a pic, I don't have any account for hosting pics anymore.

Paul

10-16-2019, 02:31 PM	#1
WIDESIDE72 Senior Member Join Date: Aug 2008 Location: Cedar Park, Texas Posts: 7,494	LS Fuel tank/ electric fuel pump ideas/ input needed I'm about to embark on my latest project, swapping an LS1 onto a 72 swb chassis, then installing a 70 cab and clip. I am trying line out the major issues, one of which being the fuel system. Instead of going the "cubic dollar" route, I am trying to keep it low buck. I have a fuel tank out of an 82 Suburban I parted years ago. It seem that it is similar in width to the Blazer tank I used in another 72, but deeper. My thoughts are using a sending unit out of an 87-91 (that was originally equipped with an electric fuel pump) and instead of the tbi pump, I would use a pump from a newer vehicle, perhaps the donor 02 Trans Am, or newer LS equipped pickup. Thoughts?

10-16-2019, 02:49 PM	#2
Leonard1 Registered User Join Date: Nov 2005 Location: Paducah, Ky Posts: 400	Re: LS Fuel tank/ electric fuel pump ideas/ input needed Just use an EP381 pump. It will fit right in the 87-91 sender.

10-16-2019, 05:19 PM	#3
AussieinNC Moderator Join Date: Jun 2017 Location: Cherryville, NC Posts: 2,153	Re: LS Fuel tank/ electric fuel pump ideas/ input needed Check out the LSX swaps sub forum.... https://67-72chevytrucks.com/vboard/...play.php?f=206 __________________ Family and country before all others... 2006 Chevy Silverado (Daily Driver) 2012 Chevy Equinox

10-16-2019, 05:41 PM	#4
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: LS Fuel tank/ electric fuel pump ideas/ input needed I have a 93 Suburban tank in my 71 and swapped out the pump for a LS pump when I did the motor swap from the TPI motor. Works great. Mine is 42 gallon and up inside the bed under my cover. People flip out when they see me pumping gas but I can get right at 700 miles on a tank of gas. I still have plenty of room inside the bed also. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

10-17-2019, 12:15 AM	#5
prodjay10 Registered User Join Date: Jun 2016 Location: Phoenix AZ Posts: 429	Re: LS Fuel tank/ electric fuel pump ideas/ input needed I’m going the Jeep Wrangler tank. The suburban tank didn’t fit between the crossmembers like I’d like. I would either have to cut the crossmembers or drop the tank down low. I didn’t want to do either.

10-17-2019, 03:35 PM	#6
verdell Registered User Join Date: Feb 2013 Location: Columbus, MS Posts: 435	Re: LS Fuel tank/ electric fuel pump ideas/ input needed I'm currently using a 1992 S10 Blazer 20 gallon tank along with an EP381 fuel pump and it works great. Also used a 1987 Chevy van tank before along with the EP381 pump but it hung a little lower than I wanted. Both these tanks are from throttle body vehicles so they have built in pans to prevent fuel starvation and the sending units easily accommodate the upgraded pump required to run LS applications.

11-04-2019, 03:18 PM	#7
WIDESIDE72 Senior Member Join Date: Aug 2008 Location: Cedar Park, Texas Posts: 7,494	Re: LS Fuel tank/ electric fuel pump ideas/ input needed I figured out that the suburban tank is too big. It won't fit in between the cross members. I used a 72 blazer gas tank in the truck in my profile pic, but it was carbed. The 72 blazer tank is rectangular when viewed from above, and the suburban tank I have is square. It might work in a lwb, but mine is a swb. I contemplated using a blazer tank again, but IIRC, the newer sending unit needed for the factory style electric fuel pump wont't fit in the blazer tank (larger diameter).

11-05-2019, 12:16 AM	#8
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,246	Re: LS Fuel tank/ electric fuel pump ideas/ input needed Here are a couple of the few options from Tanks Inc for a EFI tank for a shortbed. https://www.tanksinc.com/index.cfm/p...rod/prd173.htm https://www.tanksinc.com/index.cfm/p...rod/prd249.htm __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

11-05-2019, 07:11 AM	#9
mcmlxix Collector of Projects Join Date: Apr 2003 Location: Las Vegas Posts: 3,106	Re: LS Fuel tank/ electric fuel pump ideas/ input needed If you have a good tank, use the install ring that allows you to use the OEM late model pump module... https://www.vaporworx.com/product-ca...ounting-rings/ https://www.vaporworx.com/product/rwtak/ __________________ Rich 1972 K5 Blazer CST Click HERE D60 BIG BRAKE UPGRADE Click HERE Last edited by mcmlxix; 11-05-2019 at 07:16 AM.

11-05-2019, 10:52 PM	#12
88Ironduke Registered User Join Date: Jul 2010 Location: Willingboro, NJ Posts: 489	Re: LS Fuel tank/ electric fuel pump ideas/ input needed I used an LMC gas tank (21 gallon I think) and a Speedway motors fuel pump with a sump assembly. To fit the tank in between the rails you have to cut out one of the cross rails for the steel bed just behind the rear wheels, not pleased but not a terribly big deal. When the tank is put is in place the top of the tank is really close to the bed floor. I had to recess the roof of the tank (ultimately wasn't enough but we adapt) and allow for clearance on top for the 90' -6AN fittings. It worked out really well, the process wasn't pretty but effective. PM if you would like a pic, I don't have any account for hosting pics anymore. Paul __________________ Retired USAF - No rockets, no mortars, no bad guys shooting...No stress!!! My Build Thread: Project 72' Green http://67-72chevytrucks.com/vboard/s...d.php?t=587932

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