At this point the 392 is a flagship model. Like the hellcat its purpose is likely to get people into the showroom to buy the lower trim models. Until the epa says absolutely no v8s they'll likely take the fines and push the cost on to the customer. Like the gas guzzler tax. (Not sure if thats a thing outside ca)Oh trust me, you'll still be able to add another 10-15k in options. The half doors alone are $6000 I believe it is.
Also, don't count on the V8 lasting much longer. While I can't say for certain, I keep reading things from numerous automotive news sources that say that the V8 in general is living on borrowed time. At one point late last year they even interviewed one of the Dodge Challenger engineers and they said that the next generation of Challengers may have to forego a V8 altogether due to taxes, emissions, and trying to constantly keep up with EPA standards.
I wouldn't be surprised if the V8 is eventually phased out in favor of a V6 twin turbo (or similar) like Ford has done with the EcoBoost.
https://www.motor1.com/news/485678/ford-f150-raptor-v8-confirmed/