Thanks for the replies. I have Pedro's DOF so I guess that plug is no longer available
I want to use the AEM because I already have a matching AEM A/F meter on the car.
Unfortunately the AEM sender doesn't have a low-pressure switch that I can see. And I'd rather keep the idiot light since to me it's more visible than the gauge.
I do know however that my sender is bad (which is why I got the gauge cheap). I'm going to sacrifice the harness and try connecting each wire to see if one of them sends the info to the gauge. I'll post this on AEM's FB page since they seem to answer tech questions rather fast over there.