Fuel Tank Interchange?
Thread Starter
Burning Brakes
Joined: Apr 2002
Posts: 1,105
Likes: 114
From: Lawrenceburg, KY
Fuel Tank Interchange?
Will fuel tanks from any year C3 physically "fit" in any other year C3?
I've got a 79 and I'm all set on my EFI swap for now (I'm using an 82 EFI sending unit with a Walbro pump), but down the road I would like to swap to an aluminum fuel tank that has baffles so I'd like to know what I can/cannot do.
I've got a 79 and I'm all set on my EFI swap for now (I'm using an 82 EFI sending unit with a Walbro pump), but down the road I would like to swap to an aluminum fuel tank that has baffles so I'd like to know what I can/cannot do.
Race Director
Joined: May 2006
Posts: 18,648
Likes: 2,557
You already have the largest C3 tank at 25 gallons
https://www.gastanks.com/mobile/1978...ctinfo/GM-72A/
https://www.gastanks.com/mobile/1978...ctinfo/GM-72A/
Thread Starter
Burning Brakes
Joined: Apr 2002
Posts: 1,105
Likes: 114
From: Lawrenceburg, KY
You already have the largest C3 tank at 25 gallons
https://www.gastanks.com/mobile/1978...ctinfo/GM-72A/
https://www.gastanks.com/mobile/1978...ctinfo/GM-72A/
Le Mans Master
Joined: Apr 2001
Posts: 5,941
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From: Was New Orleans but swam to Baton Rouge LA
Cruise-In IX Veteran
The later c3 when they went with the big back glass have a different filler neck location from earlier c3. That would cause a big issue in fitting different tanks in your car.
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68s wont work for you, the sender goes in from the bottom
Le Mans Master
Joined: Jan 2001
Posts: 6,678
Likes: 1,363
You're complicating the crap out of this unnecessarily. Just get a CANISTER-type EFI pump and return the fuel to the canister. You can adapt the assembly to your 82 sending unit assembly a lot easier than going through the rigamarole of installing a baffled tank.
Here are some pictures of my 68 with a 90s Ford Bronco Canister Type EFI pump. It would have been a lot easier to use an 82 sending unit than to fabricate my own contraption. Never loses suction ... I ran it down to fumes as part of testing...had a friend of mine with me to add gasoline.
Somthing to consider. Lotsa different canister type EFI pumps available nowadays.
https://www.corvetteforum.com/g/album/6185062
And..if you don't want to do something like that then just get one of those Holley Hydramats (expensive, but a lot simpler than a new tank). https://www.holley.com/products/fuel_systems/hydramat/
Here are some pictures of my 68 with a 90s Ford Bronco Canister Type EFI pump. It would have been a lot easier to use an 82 sending unit than to fabricate my own contraption. Never loses suction ... I ran it down to fumes as part of testing...had a friend of mine with me to add gasoline.
Somthing to consider. Lotsa different canister type EFI pumps available nowadays.
https://www.corvetteforum.com/g/album/6185062
And..if you don't want to do something like that then just get one of those Holley Hydramats (expensive, but a lot simpler than a new tank). https://www.holley.com/products/fuel_systems/hydramat/
Will fuel tanks from any year C3 physically "fit" in any other year C3?
I've got a 79 and I'm all set on my EFI swap for now (I'm using an 82 EFI sending unit with a Walbro pump), but down the road I would like to swap to an aluminum fuel tank that has baffles so I'd like to know what I can/cannot do.
I've got a 79 and I'm all set on my EFI swap for now (I'm using an 82 EFI sending unit with a Walbro pump), but down the road I would like to swap to an aluminum fuel tank that has baffles so I'd like to know what I can/cannot do.
Last edited by carriljc; Dec 21, 2020 at 08:30 PM.
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