I give up. Your troubleshooting skills are questionable. You always need to do the easiest, cheapest thing first before you dig into something that may or may not have anything to do with your problem. It's a process of elimination, even if you are sure that what you are doing is not going to make a difference.
The plugs cannot be determined to be bad by life or by just looking at them, and by changing them (the cheapest, easiest, and most probable item) with ones that you know to be good, you will at least eliminate that as the problem rather than tearing the entire engine apart and finding nothing and then coming back to change the plugs. Seems a little bullheaded to me.
Likewise, you are not sure if the compression reading you got is correct or not. The tester may be off, the reading you are getting may be within the acceptable range, you just don't know for sure. The only thing you do know is they are very close in value and not entirely way out of the ballpark. You need to get the actual suspected value for a 4-tech and to make sure what you are reading is correct, try another compression tester before going on a fishing expedition by tearing the engine apart. If you were to have broken or loose head bolts, you most likely would see coolant where it shouldn't be and the compression readings would not be that similar.
Look at the supercharger hose that was suggested, again a cheap and easy possibility that will either be the problem or will be eliminated as a possible cause.
Good luck.