I saw a J60 MAF in the junkyard this weekend. I cant remember which car it was on, but that same MAF is available in a USDM car. I want to say it was on a Altima and may be the same as a stock KA-DE MAF. Neither Enthalpy nor JWT write tunes for it and I dont know if the SAFC has a setting for it. Look around in the RB forum for someone with an RB20 and SAFC.
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Unless you have the MAF in hand, I'd look around for a N60. You can pick one up for about $75. I have one to sell. I just need to take a picture before I post the ad.