I agree on most of your write up. One area I would like to add to, or rather clarify, is the manifold explosions. Actually, imo, this is more so an issue with modern plastic intakes (will expand later). A manifold of old, ie: cast iron, aluiminum and a top mounted carb was/is much less likely to blow apart. Here's why, our modern lsx intakes are of a lighter plastic which is not as strong, and the fact that the intake runners are below the plenum and mix has to go up and over, meaning the heavier fuel droplets can be less than perfect on their journey. Also, with the front mounted intake opening a back fire has a harder time escapeing compared to a top mount and thus the reason for explosion coming through the plastic intake many times.
I agree that a stock bottom lsx can in fact be run safely if the tune is up to par. But the saying will certainly apply, "If you want play, and can't pay, don't spray"
especially on the bigger hits as there are no absolute gurantees.
Robert