Thanks EVERYONE for your responses. While I was lurking I saw more posts on drag racing than auto cross which made me join.
My current ride is a '10 Challenger Classic I bought new. After the warranty ran out I thought about adding a supercharger and related components. I was on a forum where some guys have done this and were running mid 11's and wanted to know how and how much. Well, it aint a bolt on deal and to bring up the rest of the drivetrain to that level made me balk at modifying a car with 10k miles.
A few months later FCA announced the Hellcat. Already done with warranty. Makes modifying my car a mute point but can't get over sticker price or possible depreciation in a few years. I've been looking for an alternative for over a year.
This V-8 swap sounds interesting and I'm going to do more research.