Will the '94-'95 Thunderbird 3.8L or 4.6L naturally aspirated MAF work in 89-93 Mustangs? It looks like no flange adapter is needed and I think it's also a 70mm unit.
If you are using a standard A9x ECU without a tune, then the only compatible 70mm MAF has the f2vf-12b579-a1a part number.
The only vehicles that have these are
1995-94 Mustang 3.8L F2VF-12B579-A2A,
1994-92 Crown Victoria 4.6L F2VF-12B579-A2A,
1995-94 Mustang, Mustang Cobra 5.0L F2VF-12B579-A2A,
1994-92 Town Car 4.6L F2VF-12B579-A2A,
1994-92 Grand Marquis 4.6L F2VF-12B579-A2A,
Like I said before, I have one on my car and the car drives beautifully. No idle surge or hunting, very smooth, plenty of power (for e7 heads) and very reliable
Now if you are running MS then you can use whatever you want with the proper transfer function data. I was actually going to use a 99-04 80mm slot style MAF with integrated ACT with my MS3