I know it's more expensive, but I would recommend looking into just buying a new crate engine from Dodge. The standard Hellcat and Redeye engines have a warranty if you buy them new. I don't think the 426 crate engine comes with the full term warranty. The two production motors definitely do.Most complete drop out engines are advertised for 8-10k, 13-15k for trans, wiring, ecu.
I'm always looking for one to transplant into my coronet. I did miss a verified deal of 11,500 for a full set up