I just looked at my 06 and I have only one hole and it does not have a thread-cert.
me to only one hole
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mustang v6, s&b intake, with painted cover flowmaster, 16x7 in front 17x9 in back,with 2 inch drop in the front, costume paint on rims, black grill, with gt fog lights with angel lights, and running mustang, smoked headlights, with headlight splitters, smoked out turning lights, racing stripes, blackout trunk kit, all new audio system, 4 jl audio 5x7 speakers front and back 2 jl 12 inch w6v2 with 2 jl 500/1 amps and pa system 1967 mustang working on
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one act of kindness at a time
Well my 07 Gt had both holes because when we dropped in the GT500 motor and wiring harness we didn't have to modify anything to mount the electronics.
Odd!
GT500 wiring harness and electronics in 07 GT
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2007 Mustang GT Vista Blue 740RWHP/motor 904RWHP/spray 9.01 @ 152 mph 1/4 mile, 1.40 60' 2008 Clash of the Titans World Finals Champion 2009 Strictly Street Points leader/ET & MPH Record Holder
2009 GT500 Grabber Orange Vert 594 RWHP 11.5 @ 120mph it's my slow car!
Mine have little plastic things stuffed in them. oh yea, I did that.
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2006 GT Vert Prem. Tungsten Gray, 18"s, Auto (It's really better), Roush suspension, BBK, Brenspeed SCT2, Polished Pypes, and some other stuff that I have already forgotten.