I personally drilled an undersized hole, and threaded the sensor in.
The 'X' method seems a bit rough to me.

 

I think this is a better plan in any event.

 

I would've replied sooner if plenum gaskets were interesting, but better late than never, right? That sounds an awful lot like a sticky PCV valve. As strange as it seems, the best bet is to score a dealer part. The variance of the aftermarket parts is too great so they're too likely to be overly generous.

 

It's worse than that.

Relocating the IAT to get a richer mix at WOT means also getting a richer mix during cold start/warm-up. Personally, a couple top end WOT horsepower that I couldn't even perceive without a machine to tell me they're there aren't so valuable that I'll accept increased carbon deposition and oil contamination to get it.

If I had a Hughes FI Airgap manifold, after feeling rotten for putting money in that lot's pockets I'd add a port right near that #8 hole for my IAT to live in.

 

Didn't they start putting a threaded hole in the plenum, just below the throttle body on those?

 

On Hughes' poorly thought out piece? I haven't heard that rumor. Their online installation instructions still say "This manifold does not have provisions for the I.A.T. sensor, which is good", but the file may be out of date -- it says it was last updated in April 2013.

 

Hhhhmmmm..... Maybe I am thinking of the M1.......

 

So I had an interesting day. I pulled everything out of the way of the intake and pulled all the intake bolts. Well, the two front ones snapped off in the block. I'll have to use the torch and use some vice grips to get them out. The new issue I ran in to was that I can't get the intake off! I tried some well placed smacks with a rubber mallet and even some pry bars, but nothing worked. Not really sure what I'll do next.

 

It hangs on pretty tight.... and all the crap that has built up around those two broken off bolts aren't helping either. Try and get the back to break loose. (there are twelve bolts, did you get them all?) Once the back is loose, just wiggle the manifold, while prying up on the front.... Having a friend makes the job a lot easier.

For the broken bolts, dig all the crap out from around where they go into the head, there is a bit of larger hole around them, once you get that cleared, drown with some pb blaster, grab the bolt with your vice grips, and while you are working the vice grips back and forth, tap on the end of the bolt with a hammer. They should break loose fairly easy at that point, and then thread right out.

 

Yes, sir! I got all twelve. Well, 10, haha! It's been repaired before and whoever used it piled on TONS of gasket maker all over the seals and it's just everywhere. I'm going to continue messing with it this morning to see if I can get it off by hand. Push comes to shove, I have my cherry picker and I can put some bolts back on the intake with a chain and try and lift it off that way. As for the stuck bolts, that's what I'm planning on doing with them. I may even get the torch and apply a little heat to help the process along, haha! Hopefully by this evening it will be all done.