Those LT based iron blocks are stout pieces for the money! We are doing 2 of them right now for 2000+whp drag and drive events.Depending on your budget, GM LT8 with mods to run LS heads and even the LT8 GM steel crank is very capable of that and above. My buddy Kurt Urban that now works for Scoggin Dickey had one at the PRI Show that was making over 2000HP with a pair of Precision 7685's. On the other end of the spectrum a Dart LS Next or LS Next 2 are the strongest on the market and have some nice features if you ever go higher than current power goals. They also offer more reliability and piece of mind when pushing an engine that hard. If you are going supercharged I would definitely recommend the LS Next 2 over the other options as the supercharger loads the engine harder than turbos will. I'm currently building a twin turbo, aluminum LS NEXT 2 engine for myself. Hope this helps.
I think they are around 2200 from Scoggin Dickey.