Re: Fuel tank upgrade sending unit
Your in cab gas tanks sending unit will not work in a '69-'72 K5 Blazer tank. If you want to use a OEM style sender with an in tank pump, I believe you will want to use a '88-'91 K5 Blazer tank. What I would do, is purchase the later model '88-'91 EFI tank now and make an adapter plate to mount a 0-30 ohm sender in the EFI tank with the larger opening.
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