If it is just the idea of having a Hellcat engine IMO you will spend around the same $$ as a good used Hellcat. If you want Hellcat power you are still going to spend a lot of $$ like SteveWhite Motors said. My Dayton (640 rwhp/665 lb-ft) cost $15,000 for the forged engine, SHR Transmission, Heads and Fuel system. Then the Getrag rear end cost a little over $2000. The E-Force blower cost around $7000. All the computer stuff works like it came from the factory, Unlike the headaches you will have with an Hellcat engine swap.