Gas Tank Replacement
Thread Starter
Heel & Toe
Joined: Oct 2001
Posts: 17
Likes: 0
Gas Tank Replacement
Hi,
I have a 1969 corvette that has a leaky gas tank that needs to be replaced. The car was originaly equipped with the 350 C.I., 350hp, 380 ft-lbs trq engine option, but is curently running a 427 Big Block intalled by a previous owner. I see from various parts catalogs that corvettes were equipped with different gas tanks depending on the engine they came with. I don't know the difference between the gas tanks, so the question I have is, which gas tank should I purchase as the replacement? Will the original engine type determine which gas tank will fit correctly, or the current engine type?
Thanks,
Joe
I have a 1969 corvette that has a leaky gas tank that needs to be replaced. The car was originaly equipped with the 350 C.I., 350hp, 380 ft-lbs trq engine option, but is curently running a 427 Big Block intalled by a previous owner. I see from various parts catalogs that corvettes were equipped with different gas tanks depending on the engine they came with. I don't know the difference between the gas tanks, so the question I have is, which gas tank should I purchase as the replacement? Will the original engine type determine which gas tank will fit correctly, or the current engine type?
Thanks,
Joe
Last edited by 69rumble; Aug 1, 2007 at 01:01 PM.
Thread Starter
Heel & Toe
Joined: Oct 2001
Posts: 17
Likes: 0
I think you'll find there are 3 possible scenarios, depending on the original engine and car build date ...
1. small blocks and 390hp big blocks had Quadrajets with a return line.
2. big blocks with 400, 435 and 430hp had Holleys with no return line.
3. Gas tanks changed in August of 1969 (see AIM, UPC8, B1) for the small blocks and 390hp big block.
I guess it all depends on what the size of your big block is, and if you want to keep it original or not.
See ...
http://www.quantaproducts.com/products.asp?dept=19
1. small blocks and 390hp big blocks had Quadrajets with a return line.
2. big blocks with 400, 435 and 430hp had Holleys with no return line.
3. Gas tanks changed in August of 1969 (see AIM, UPC8, B1) for the small blocks and 390hp big block.
I guess it all depends on what the size of your big block is, and if you want to keep it original or not.
See ...
http://www.quantaproducts.com/products.asp?dept=19
Thanks for the explanation. I was hopeing that there wasn't much of a difference between the types (maybe just size) but it sounds like there are some important differences. I guess the current setup is what matters (return lines etc.). The smart thing for me to do is remove the current gas tank and see what kind is currently being used and order the proper replacement.
Thanks again,
Joe
Team Owner
Joined: Jul 1999
Posts: 26,545
Likes: 46
From: Huntersville NC
There is very little difference. One tank will have a little tube that attaches to a fuel return line, while the other tank will not have the little tube. I just changed the tank in my 68. My fuel return line is currently not hooked up, but I bought the right tank that has the tube for the fuel return line. I just attached a hose to the tube and capped it off, so if I want to hook up the fuel return line in the future it will be right there for me.
My recent gastank replacement thread:
http://forums.corvetteforum.com/show....php?t=1754412
My recent gastank replacement thread:
http://forums.corvetteforum.com/show....php?t=1754412
Thread Starter
Heel & Toe
Joined: Oct 2001
Posts: 17
Likes: 0
There is very little difference. One tank will have a little tube that attaches to a fuel return line, while the other tank will not have the little tube. I just changed the tank in my 68. My fuel return line is currently not hooked up, but I bought the right tank that has the tube for the fuel return line. I just attached a hose to the tube and capped it off, so if I want to hook up the fuel return line in the future it will be right there for me.
My recent gastank replacement thread:
http://forums.corvetteforum.com/show....php?t=1754412
My recent gastank replacement thread:
http://forums.corvetteforum.com/show....php?t=1754412
Last edited by 69rumble; Aug 2, 2007 at 03:10 PM.
