I gotta tell you I must be doing something wrong
I just don't seem to have all these problems & have been running aluminum heads for over 30 years,,,,,
In that time I think I may have stripped maybe one or two plugs & a couple of bolts
But I certainly have fixed a number of stripped holes so I guess the gorilla tightening system is used on occasion
Like Jay, I have not used a torque wrench on an intake or exhaust bolt in probably 20 of those years now & just do not have problems.
And you are all aware that even the best torque wrenches may have an error of Ī about 3% right?
This is assuming they are calibrated once in a while,,,,
Add another 5 or so percent for "operator" error,,,
and another 5 or so for the different lubes folks use,,,,
Again, my opinion there are just not all these issues with aluminum heads if you use a modicum of common sense with them
There are of course a few "rules"
You don't use straight water
You change your coolant on occasion
You use anti-seize on the fasteners
You use the correct length fasteners
You do not use the "gorilla tightening system"
When all else fails follow the instructions,,