Jeez, tough crowd.
Yes, it doesn't hold any HP records. Although Chevy does tend to understate HP.
What it does, it proves "old school" engine design is alive and well for production engines. This bolts up to a 2012 minitruck (drop in) or even a FWD sedan. Obviously, since they (family) are already in there from the factory. These are engines that routinely go over 200,000 miles.
For a V8 it's small and light and mainly CHEAP. 450HP is with the emissions and accessories, programmed for pump gas. Figure in a few hours and some skill, you'd increase about 15% based on the other models.
No, it's not useful for LSR, hence the NON LSR Posting. It is useful for street and dirt purposes. And like the other SBC's you'll probably be able to buy it in crate format.
The LS1 is now about the most common engine swap done to older cars and sand toys. It was 345HP at first, now it's higher. And yes, the LS7? goes 505HP NA, but it's fairly pricey, since it is dry sump, titanium rods, and ported heads.