Gas tank swap

Martimus · Jun 24, 2024

I have an 83 1/2 ton silverado short bed frame with a 78 El Camino body sitting on it. The previous owner had used a fuel cell in the bed. I would like to put a blazer/suburban type fuel tank on this short bed frame so that it has the fuel tank in the back between the frame rails. I bought an 88 suburban frame for the crossmembers that hold the tank, and I'll use new straps. The 88 suburban tank has a fuel pump in it, and is pretty rusty so I want to buy a new tank and sending unit without the fuel pump assembly. Will an 82-86 non-EFI blazer/suburban tank fit using the 88 crossmembers without too much modification? I figure I might need to drill a hole or 2, no big deal. I'm not worried about the fuel lines. I will be using an old school motor with a mechanical pump. Pics of the truck included.

Bextreme04 · Jun 24, 2024

Martimus said:
I have an 83 1/2 ton silverado short bed frame with a 78 El Camino body sitting on it. The previous owner had used a fuel cell in the bed. I would like to put a blazer/suburban type fuel tank on this short bed frame so that it has the fuel tank in the back between the frame rails. I bought an 88 suburban frame for the crossmembers that hold the tank, and I'll use new straps. The 88 suburban tank has a fuel pump in it, and is pretty rusty so I want to buy a new tank and sending unit without the fuel pump assembly. Will an 82-86 non-EFI blazer/suburban tank fit using the 88 crossmembers without too much modification? I figure I might need to drill a hole or 2, no big deal. I'm not worried about the fuel lines. I will be using an old school motor with a mechanical pump. Pics of the truck included.

I would get the newer EFI tank. The only difference is that the EFI tank has a big baffle in it, which isn't necessary for carb, but is still nice to have. You can run an early sending unit in the later EFI tank no problem. I have a late EFI Blazer 31 Gallon tank in mine with the EFI sending unit in it with the pump replaced with a tube and strainer until the EFI swap happens. Works perfect for several years now. I had an old non-EFI sending unit as well and it fit fine in the EFI tank, but the fuel line connections are different and I'd already put in the hard lines that fit the EFI sending unit.

SquareRoot · Jun 24, 2024

Martimus said:
I have an 83 1/2 ton silverado short bed frame with a 78 El Camino body sitting on it. The previous owner had used a fuel cell in the bed. I would like to put a blazer/suburban type fuel tank on this short bed frame so that it has the fuel tank in the back between the frame rails. I bought an 88 suburban frame for the crossmembers that hold the tank, and I'll use new straps. The 88 suburban tank has a fuel pump in it, and is pretty rusty so I want to buy a new tank and sending unit without the fuel pump assembly. Will an 82-86 non-EFI blazer/suburban tank fit using the 88 crossmembers without too much modification? I figure I might need to drill a hole or 2, no big deal. I'm not worried about the fuel lines. I will be using an old school motor with a mechanical pump. Pics of the truck included.

Gas tank swap

Martimus

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Bextreme04

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SquareRoot

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