84GT EFI Conversion fuel system ???'s

[fiveliter8]

Okay, I have everything I need for the conversion sans fuel tank and gave the harness the appropriate "diet". I have heard that a fuel tank out of an 86 GT is the only one that will work. From what I understand, the pump and sender are integral and go into
one hole. 87-up has the sender and pump in separate holes. I'm having extreme difficulty finding a 86GT tank and all the yards are
telling me it's the same as 87-up, which I know it's not-the sender is reverse resistance of 86 and older and of course the integral sender/pump on the 86. Other yards tell me everything is the same for in-tank pumps from 83-86, regardless of engine
configuration. Can anyone who has done this clear things up for me before I spend money on the wrong tank. I also considered
using my existing tank with an external pump, but that will be last resort. Thanks!

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Factory Five Roadster Build
Yellow T-roofed 84GT (In users rides)&
20th Anniversary GT350 ragtop