1995 Chevy Lumina 3.1 connecting computer

Still trying to connect my 1995 Lumina to my computer! If anyone has any information at all, please forward to me. Someone with first hand experience
preferred. I have already built an OBDI interface, that doesn't do it. I have found this website Http://www.andywhittaker.com/ecu/aldl.htm , but it doesn't say anything in regards to the SFI version of the 3.1 Vin M body W.
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