+1 on Helicoil !

 

The hole is more of an oval so I would have to drill it even bigger. If I did that I wouldn't have much material left for a helicoil. I already thought about the bolt at the bottom but it was too close to the head on the bottom side to get the nut and bolt lined up. I'm going to try that way one more time with a different nut and bolt and if that doesn't work I have some quick steel that I'm going to try. I'm hoping I can get this all done tonight so I can finally get back to driving my truck and to see how it drives without any problems. The plenum has been bad I think the whole time I have had the truck so I don't really know how a properly running 360 feels. Thank you everyone for all the input and advise.

 

So after a week of battling this thing, I'm finally done (well almost, have to go get a bolt later). What I ended up doing is taking some quick steel and a small scrap allen wrench and after working the epoxy I shoved it down the the hole (there was more material than I originally thought, about 75% of the threads). I took a grade 8 bolt and coated the threads with oil then started to work it in the hole holding my finger at the opening at the bottom to try to hold in as much material as possible. It says that it sets up in 5 minutes and fully cures in an hour. I let it set for about 6 or 7 minutes and proceeded to back the bolt out. Perfect hole with threads without trying to drill and tap the quick steel. I did some reading and some people had problems with it chipping and flaking away. Replaced the gaskets and put back on the intake. Torqued everything down to spec and it holds good. I didn't run it very long because I lost a bolt holding the support bracket for the ac compressor to the intake so I didn't rev it or run but a few seconds. What time I did run it it idles a like a brand new truck. 100% better than it was before. I'm ready to go get a bolt so I can take it for a spin to see how it is. Thanks again everybody.