[BigAls87Z28]

I think thats a pretty good accomplishsment and shows how much real power the 5th gen is putting down.
It omes in at about 200lbs heavier then the lightest Z28/Formy from the factory.
It has massive wheels, 4 inches larger in diameter then said Z28/Formy
Larger brakes
IRS

It doesnt matter in the end. I think the OP stated the question wrong.
Will the LS1 die? yes, the LS1 is pretty much dead.
Will the Gen III/IV die? No, because its still alive. LS1's smaller bore will slowly fall out of favor as the larger 6.0 blocks start to make its way out there. People are already doing massive displacement Gen III/IV motors, so tey arent gong to stay with the small bore 5.7 LS1.
The LS1 will be like the 327 of its time. Good power, was in a lot of performance applications, but larger displacement engines and better technology took it over.

My question is...what happens when the Gen V"s roll out in a about a year or two? Direct Injection FTW...