I was going to say that the EGR hole in the header is an M22x1.5 but someone beat me to it.
But for those that are real cheap like myself, you can the block off plates off gen1 and gen2 Rangers with the 2.9 and some gen1 Explorer 4.0s.
04 ZX3 Mostly Stock ["Best Non-SVT" FITF '12][3/13 ROTM][7/14 ROTM][2014 ROTY]
12 SE Hatch Sport & Winter Package, ST Front End
94 F150 XLT 5.0 HO, OBDII Swap
89 Bronco II XLT Crawler