All in good standing. If I were just bumping into this thread, I'd be curious and or suspect of such things and if they have been thoroughly thought out as well. I'm still testing, its a mule thing but within reason.
There might be some items that reverse back to total stock, but so far all is good.
There are places where there is a good portion of weight to be removed and I won't go there.
I've read about some rather unorthodox moves and grooves from the factory engineers themselves back in the day and for the most part, we all still apply and run those tricks, but some were out of this world and not to be tried at home.
Case in point, Aluminum headers. Wow!