So I suspect I might go with a Mendeola transaxle. I plan on driving this on the street, and maybe visit an autocross once or twice. Because of that, I'd like to save a buck and go with Mendeola rated at 500 hp (I'm pretty sure that's right?).

So, any recommendations on crate engines that approach the 500 HP mark?
I saw this LS3 525 HP recommendation on the forum here.
The BluePrint Engine is a bit tooooo beefy (the "small" one is 585 HP, significantly beyond the 500 HP rating) and a bit pricey.

Obviously I can just google "LS3 crate engine", but there might be experience here that I can't find with a forum search tool.