want larger gas tank - The 1947 - Present Chevrolet & GMC Truck Message Board Network

*k.t.* · 11-01-2009, 08:07 AM

I am looking for a larger fuel tank for my 72 K/5. I was told a 31 gal. tank from a 85ish blazer will fit. Has anyone tried this? If so is it easy to do? or are there other tanks that will fit? any info would help.

turp mcspray · 11-01-2009, 04:55 PM

I have done this. I think they make a 24 gal as well. I'm not sure on the difference in dimensions between the two. Seems like JC Whitney used to list dimensions for the different size tanks.
I put a 31 gal tank in mine. Any blazer from 73 up. Get a sending unit from the earlier years. They have less lines to plug off. I moved the original rear crossmember back as far as it would go. I used a front tank crossmember from a blazer or suburban. I used the filler neck from my original tank. Solder it to the newer tank. The newer tanks have the filler on the passenger side, so you will have to remove it and solder a piece of metal over the hole. Not very difficult to do. The extra capacity has been one of the best things I have done to my blazer. Hope this helps.

Critter · 11-01-2009, 05:34 PM

The previous owner of my Blazer did this and I like it. The main difference that I can see is the metal straps that hold the tank in place. If I'm not mistaken the original tank straps ran side to side under the tank. The newer 73+ style runs front to back, at least thats how the PO did it on mine. He just drilled some holes to one cross member and added another out of square stock. I am in the middle of rebuilding my blazer and I plan to freshen up this tank and re-use it, as far as I can tell it is the 31 gallon variety.

turp mcspray · 11-01-2009, 05:46 PM

I new there was a reason for using the newer front crossmember. I just couldn't remember what the heck it was!

*k.t.* · 11-02-2009, 04:27 AM

I did find a 37 Gal. tank. It comes in a kit, has every thing you need at http://www.justgastanks.com but it is $599.99 to pricy for me. The dimensions for the origanl tank is 29"x14"x17" 21 gal. The 25 gal. out of the 73- is 28"x28"x11" and the 31 gal. is 28"x28"x13". Will the sending unit out of the origanl tank work in the 31 gal. tank?

capev86 · 11-02-2009, 10:32 AM

what was the source for the 37 gallon tank? thinking it might be adaptable to a burb also. CPP has a 26 gallon tank for my 72 burb, but 5 extra gallons isn't worth the $600 investment plus installation.

Burt4x4 · 11-02-2009, 11:27 AM

Not a very good pic but this is my,North West Metal Products, NWMP.com, 37 gal tank. It's big and the factory's location hangs a bit low..mine has been moved up about 2.5", my body lift allowed me to move it up and I built a stout skidplate to protect it..

turp mcspray · 11-02-2009, 11:35 AM

You will have to get a sending unit from a 73 up tank. I bought a used one from the salvage yard for $15. Seems like new ones were kind of spendy. When I got my tank I bought a new one. I can't remember how much. Seems like it was in the $150 range. You should be able to pick up a used one for cheap if you want to save some $.

JimmyFloyd · 11-02-2009, 04:19 PM

I got an NOS 31 gallon tank from a 90 blazer at a swap meet and will be installing it in my blazer once I get a chance to get all the parts I need for it, which is basically everything.

*k.t.* · 11-02-2009, 09:49 PM

it would be cool if you could take pics of the process.

**Thealien** · 11-02-2009, 09:58 PM

Quote:

Originally Posted by k.t.

it would be cool if you could take pics of the process.

What he said!

badpeanut · 11-02-2009, 10:03 PM

Subscribed!

JimmyFloyd · 11-02-2009, 10:12 PM

Once I find time to get to the junkyard and source the rest of the parts, I will be sure to take pictures.

*k.t.* · 11-03-2009, 03:06 AM

thanks that would be great

11-01-2009, 08:07 AM	#1
k.t. Account Suspended Join Date: Oct 2009 Location: Byron, Wyoming Posts: 48	want larger gas tank I am looking for a larger fuel tank for my 72 K/5. I was told a 31 gal. tank from a 85ish blazer will fit. Has anyone tried this? If so is it easy to do? or are there other tanks that will fit? any info would help.

11-01-2009, 04:55 PM	#2
turp mcspray Registered User Join Date: May 2007 Location: Rapid City South Dakota Posts: 2,359	Re: want larger gas tank I have done this. I think they make a 24 gal as well. I'm not sure on the difference in dimensions between the two. Seems like JC Whitney used to list dimensions for the different size tanks. I put a 31 gal tank in mine. Any blazer from 73 up. Get a sending unit from the earlier years. They have less lines to plug off. I moved the original rear crossmember back as far as it would go. I used a front tank crossmember from a blazer or suburban. I used the filler neck from my original tank. Solder it to the newer tank. The newer tanks have the filler on the passenger side, so you will have to remove it and solder a piece of metal over the hole. Not very difficult to do. The extra capacity has been one of the best things I have done to my blazer. Hope this helps. __________________ Turp Mcspray New life for an old 2wd, farm blazer http://67-72chevytrucks.com/vboard/s...d.php?t=505987 My Blazer build http://67-72chevytrucks.com/vboard/s...d.php?t=342299

11-01-2009, 05:34 PM	#3
Critter Future TOTM Winner Join Date: Aug 2006 Location: Bulverde, TX Posts: 2,692	Re: want larger gas tank The previous owner of my Blazer did this and I like it. The main difference that I can see is the metal straps that hold the tank in place. If I'm not mistaken the original tank straps ran side to side under the tank. The newer 73+ style runs front to back, at least thats how the PO did it on mine. He just drilled some holes to one cross member and added another out of square stock. I am in the middle of rebuilding my blazer and I plan to freshen up this tank and re-use it, as far as I can tell it is the 31 gallon variety. __________________ 72 Chevy CST K5 HIGHLANDER BLAZER Getting a 6.0,NV4500,NP205,14BFF (Currently laying all over the place in little pieces) 72 Chevy swb step-side "LS" 6.0 Here's a build thread of sorts 2002 HD2500 Crew Cab, 8.1L Allison 4x4 Daily Driver Check it out www.lsdyno.com

11-01-2009, 05:46 PM	#4
turp mcspray Registered User Join Date: May 2007 Location: Rapid City South Dakota Posts: 2,359	Re: want larger gas tank I new there was a reason for using the newer front crossmember. I just couldn't remember what the heck it was! __________________ Turp Mcspray New life for an old 2wd, farm blazer http://67-72chevytrucks.com/vboard/s...d.php?t=505987 My Blazer build http://67-72chevytrucks.com/vboard/s...d.php?t=342299

11-02-2009, 04:27 AM	#5
k.t. Account Suspended Join Date: Oct 2009 Location: Byron, Wyoming Posts: 48	Re: want larger gas tank I did find a 37 Gal. tank. It comes in a kit, has every thing you need at http://www.justgastanks.com but it is $599.99 to pricy for me. The dimensions for the origanl tank is 29"x14"x17" 21 gal. The 25 gal. out of the 73- is 28"x28"x11" and the 31 gal. is 28"x28"x13". Will the sending unit out of the origanl tank work in the 31 gal. tank? Last edited by k.t.; 11-02-2009 at 07:36 AM.

11-02-2009, 10:32 AM	#6
capev86 Registered User Join Date: May 2009 Location: Eliot, Maine Posts: 1,314	Re: want larger gas tank what was the source for the 37 gallon tank? thinking it might be adaptable to a burb also. CPP has a 26 gallon tank for my 72 burb, but 5 extra gallons isn't worth the $600 investment plus installation.

11-02-2009, 11:27 AM	#7
Burt4x4 Registered User Join Date: Feb 2000 Location: Modesto, CA Posts: 1,842	Re: want larger gas tank Not a very good pic but this is my,North West Metal Products, NWMP.com, 37 gal tank. It's big and the factory's location hangs a bit low..mine has been moved up about 2.5", my body lift allowed me to move it up and I built a stout skidplate to protect it.. __________________ 1972 K5 MPFI454/Sm465/Np205/D60/14FFd/Re-Centerd H1s w/Swamper Iroks

11-02-2009, 11:35 AM	#8
turp mcspray Registered User Join Date: May 2007 Location: Rapid City South Dakota Posts: 2,359	Re: want larger gas tank You will have to get a sending unit from a 73 up tank. I bought a used one from the salvage yard for $15. Seems like new ones were kind of spendy. When I got my tank I bought a new one. I can't remember how much. Seems like it was in the $150 range. You should be able to pick up a used one for cheap if you want to save some $. __________________ Turp Mcspray New life for an old 2wd, farm blazer http://67-72chevytrucks.com/vboard/s...d.php?t=505987 My Blazer build http://67-72chevytrucks.com/vboard/s...d.php?t=342299

11-02-2009, 04:19 PM	#9
JimmyFloyd Registered User Join Date: Apr 2009 Location: Rochester, NY Posts: 1,458	Re: want larger gas tank I got an NOS 31 gallon tank from a 90 blazer at a swap meet and will be installing it in my blazer once I get a chance to get all the parts I need for it, which is basically everything. __________________ 1970 Blazer 350/SM465/205 SOLD! \| 1998 Z3

11-02-2009, 09:49 PM	#10
k.t. Account Suspended Join Date: Oct 2009 Location: Byron, Wyoming Posts: 48	Re: want larger gas tank it would be cool if you could take pics of the process.

11-02-2009, 10:03 PM	#12
badpeanut Not a bad nut after all.. Join Date: Dec 2000 Location: ND Posts: 1,759	Re: want larger gas tank Subscribed! __________________ '05 Chevy 2500HD 4x4 '72 GMC LWB 4x2 driver '72 Chevy LWB 4x4 plow truck '71 Blazer 4x4 driver '70 GMC LWB trailer

11-02-2009, 10:12 PM	#13
JimmyFloyd Registered User Join Date: Apr 2009 Location: Rochester, NY Posts: 1,458	Re: want larger gas tank Once I find time to get to the junkyard and source the rest of the parts, I will be sure to take pictures. __________________ 1970 Blazer 350/SM465/205 SOLD! \| 1998 Z3

11-03-2009, 03:06 AM	#14
k.t. Account Suspended Join Date: Oct 2009 Location: Byron, Wyoming Posts: 48	Re: want larger gas tank thanks that would be great



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