Re: MAF removal woes
Had the same problem on a 98 v6, needed a new maf so went to remove it from the aircleaner etc. maf is held onto airbox with captive bolts, with nuts on top of metal clamp strips, only way to free a siezed one is to cut through the nut and split it with a dremel and cutting disc. I removed the sensor from the housing using a security torx bit and a cutter (one of the screws sheared) intending to use the housing with a new sensor and intake kit. Having bought a new maf I then tried to remove the sensor, THE SCREW HEAD IS NO LONGER A STANDARD SECURITY TORX BUT A DIFFERENT STYLE OF ANTI TAMPER HEAD. It has a different number of splines and as far as I can find out this pattern is not obtainable through any retail outlet, though you might be able to get one at a specialist such as Snap On or maybe an aircraft tool specialist.
To mend the airbox try JB Weld (not the rapid version) to fix a new captive bolt into the drilled out hole, takes about 24 hours to set, 48 to full strength but is the best epoxy based metal filler I've found. Use a stainless steel bolt and nyloc nut.
Hope that helps.