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

mtandrews · 02-23-2003, 08:55 PM

saw in an old classic chevy truck magazine a 68 pickup with a gas tank out of a buick. thats all it said in the mag. buick what??? regal, 225, front or rear drive?? a few months later a 70 with the same thing, same mag, but now tank is from an olds. Is this a good old boy secret or an oversight by the mag assuming that all classic chevy truck guys know what the donor vehicle is. I know that there are a couple of aftermarket sources where you can spend $299++ for a kit but what about us poorboys. there is a junkyard here in san antonio that sells gas tanks complete with mounting straps and sending unit all day for $30 but you pull it, you bought it. guessing can get real expensive real fast. does anyone out there know anything about this or know what vehicles' tank fits in between the rails where the spare goes. any help/info will be greatly appreciated because a big block goes through a stock 14 gallon tank faster than you can say cinco de mayo!! mtandrews@hotmail.com

Longhorn Man · 02-23-2003, 11:54 PM

try a search on the topic. It's been discussed to death.
And I have to comment...how do you only have a 14 gallon tank? Is it caved in or something?

mtandrews · 02-24-2003, 01:05 AM

the stock vented tank on the 69 cst big block is either 14 or 16 gallons from the factory. most of the 16 gallon ones of are the non-vented variety which mostly came on the 6 cyl and a few small blocks. every big block one i have seen are the vented (smaller) tank. I'll try the search. thanks longhornmail

mtandrews · 02-24-2003, 01:16 AM

just searched the topic 9 different ways. no luck. used google and yahoo.

Custom 68 · 02-24-2003, 10:56 AM

use the search on here is what they meant. It is a topic in this board. Search is at the top right...
good luck

ChevLoRay · 02-24-2003, 03:04 PM

....and I quote: "All cab model trucks (except Tilt Cabs) have a 21-gallon (17.5 Imperial Measure) capacity (approx.) fuel tank mounted behind the seat within the cab."

This tidbit doesn't say, "except for big blocks, etc.". So, unless your tank has collapsed, or you're using Imperial Measure, it holds 21 gallons in the U.S.

I did see a '72 in my hometown, that had an Olds tank. It was standing up in the front of the bed, held in place by some bungee cords. I don't know what model of Olds it came from, though.

BobM · 02-24-2003, 04:57 PM

I've heard of guys installing a car tank between the frame rails. They turn it 90 degrees in order for it to fit. Don't know the make or model they are using, but will do some investigating.

The two advantages are that they are cheaper and don't hang down as far as the Blazer tanks.

crazy longhorn · 02-24-2003, 05:42 PM

I have a 68 tank in my longhorn........it is NOT as wide as the one i pulled out. I havent checked it for capacity, but assume that it doesnt hold as much as the orig. I have been told this is BS, but had both tanks on e in front of the other! This tank is not vented.......only through the cap. I have seen what the books say, so that leaves this old man a little cornfussed! Give you guys something to think about........ anybody else see this? crazyL

Longhorn Man · 02-25-2003, 12:35 AM

I have never noticed any tanks that differ in size,a nd never read anything that supports it.
interesting....

adamls · 02-25-2003, 12:41 AM

I have a 67 with I6, and I know I siphoned at least 20 gallons out of the tank before pulling it. So it must be the 21 gallon version.

BobM · 02-25-2003, 11:37 PM

Talked to my local parts supplier. He tells me that he's heard of guys using tanks out of a 82 or 83 Cutlas which fits between the frame rails if you turn it 90 degrees and remove one of the cross braces. Haven't seen one, but might be worth while investing further. Will get the dimensions.

Jackal2k9 · 02-25-2003, 11:52 PM

poly tanks rnt that expensive i got mine from Mother Truckers a while back for 180, but i think they r 230 now.... and if you dont mind the behind the seat kind i have one that has to be atleast 20 gallons ill sell for cheap. I think i still have the mounting bolt some where.

02-23-2003, 08:55 PM	#1
mtandrews Registered User Join Date: Feb 2003 Location: San Antonio, Texas Posts: 6	gas tank saw in an old classic chevy truck magazine a 68 pickup with a gas tank out of a buick. thats all it said in the mag. buick what??? regal, 225, front or rear drive?? a few months later a 70 with the same thing, same mag, but now tank is from an olds. Is this a good old boy secret or an oversight by the mag assuming that all classic chevy truck guys know what the donor vehicle is. I know that there are a couple of aftermarket sources where you can spend $299++ for a kit but what about us poorboys. there is a junkyard here in san antonio that sells gas tanks complete with mounting straps and sending unit all day for $30 but you pull it, you bought it. guessing can get real expensive real fast. does anyone out there know anything about this or know what vehicles' tank fits in between the rails where the spare goes. any help/info will be greatly appreciated because a big block goes through a stock 14 gallon tank faster than you can say cinco de mayo!! mtandrews@hotmail.com

02-24-2003, 10:56 AM	#5
Custom 68 Registered User Join Date: Nov 2001 Location: Springfield, MO Posts: 2,939	use the search on here is what they meant. It is a topic in this board. Search is at the top right... good luck __________________ Dave 1968 Custom Chevy with turbo charged 5.3 gen III 4l80e swap 1967-71 GMC 3/4 ton long step 4x4 (not sure what year exactly?) "A good friend will bail you out of jail...but a true friend will be sitting next to you saying "that was frekin awesome". "If it doesn't fit force it...If it breaks then it needed to be replaced anyway!"

02-24-2003, 03:04 PM	#6
ChevLoRay Old Skool Club Join Date: Jun 2001 Location: Benton, AR "The Heart of Arkansas" Posts: 10,880	According the factory manual... ....and I quote: "All cab model trucks (except Tilt Cabs) have a 21-gallon (17.5 Imperial Measure) capacity (approx.) fuel tank mounted behind the seat within the cab." This tidbit doesn't say, "except for big blocks, etc.". So, unless your tank has collapsed, or you're using Imperial Measure, it holds 21 gallons in the U.S. I did see a '72 in my hometown, that had an Olds tank. It was standing up in the front of the bed, held in place by some bungee cords. I don't know what model of Olds it came from, though. __________________ Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was.

02-24-2003, 05:42 PM	#8
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,402	I have a 68 tank in my longhorn........it is NOT as wide as the one i pulled out. I havent checked it for capacity, but assume that it doesnt hold as much as the orig. I have been told this is BS, but had both tanks on e in front of the other! This tank is not vented.......only through the cap. I have seen what the books say, so that leaves this old man a little cornfussed! Give you guys something to think about........ anybody else see this? crazyL __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

02-25-2003, 12:41 AM	#10
adamls Gotta Startem Early Join Date: Oct 2001 Location: Amarillo, TX, USA Posts: 364	I have a 67 with I6, and I know I siphoned at least 20 gallons out of the tank before pulling it. So it must be the 21 gallon version. __________________ 67 SWB In Progress, one piece at a time, maybe 3 years I will be finished

02-23-2003, 11:54 PM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	try a search on the topic. It's been discussed to death. And I have to comment...how do you only have a 14 gallon tank? Is it caved in or something?

02-24-2003, 01:05 AM	#3
mtandrews Registered User Join Date: Feb 2003 Location: San Antonio, Texas Posts: 6	the stock vented tank on the 69 cst big block is either 14 or 16 gallons from the factory. most of the 16 gallon ones of are the non-vented variety which mostly came on the 6 cyl and a few small blocks. every big block one i have seen are the vented (smaller) tank. I'll try the search. thanks longhornmail

02-24-2003, 01:16 AM	#4
mtandrews Registered User Join Date: Feb 2003 Location: San Antonio, Texas Posts: 6	just searched the topic 9 different ways. no luck. used google and yahoo.

02-24-2003, 04:57 PM	#7
BobM Registered User Join Date: Feb 2001 Location: Winnipeg, MB, Canada Posts: 73	I've heard of guys installing a car tank between the frame rails. They turn it 90 degrees in order for it to fit. Don't know the make or model they are using, but will do some investigating. The two advantages are that they are cheaper and don't hang down as far as the Blazer tanks.

02-25-2003, 12:35 AM	#9
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	I have never noticed any tanks that differ in size,a nd never read anything that supports it. interesting....

02-25-2003, 11:37 PM	#11
BobM Registered User Join Date: Feb 2001 Location: Winnipeg, MB, Canada Posts: 73	Talked to my local parts supplier. He tells me that he's heard of guys using tanks out of a 82 or 83 Cutlas which fits between the frame rails if you turn it 90 degrees and remove one of the cross braces. Haven't seen one, but might be worth while investing further. Will get the dimensions.

02-25-2003, 11:52 PM	#12
Jackal2k9 Registered User Join Date: Apr 2002 Location: Katy, Texas Posts: 171	poly tanks rnt that expensive i got mine from Mother Truckers a while back for 180, but i think they r 230 now.... and if you dont mind the behind the seat kind i have one that has to be atleast 20 gallons ill sell for cheap. I think i still have the mounting bolt some where.



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