Unless you're a "name brand" builder I think you'd have a hard time selling a complete motor (not at all questioning your skills but as previously mentioned it's a cliquey). Probably easiest selling parts.

Quick question, were you planning on running the Hellcat blower on the early block? If so, where there any issues with getting the blower belt system to integrate with the early 5.7 belt system/front cover? What would the crank pulley arrangement look like?