Main Computer Harness Question

I'm doing a 4 banger conversion, I have a 89. Having a hard time finding the harness with the dual dash plugs, all seem to have the single red connector/airbag stuff and relocated fuel pump relay, I have seen this at summit FMS-M12071C302 Ford: 1986-95, 5.0L EFI, main harness, but cant get a strait answer from them as to my previous question, anyone on here have any input on this harness working specifically on the 89. Thanks in advance.

-Matt

dromeda said:

Sorry, but what is a "dual dash" plug?

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where you would look to test for engine codes under the hood, there the main computer harness plugs into the dash harness, you either have 1 red plug, or 2 grey ones. I need one with 2 grey plugs. Make a little more sense I guess...

-Matt