What's a 6.4 worth??

Sorry about the loss of your dad.

The only thing I have to add is: hell yes, a 6.4L in a 3000lb car will be a thrill and a viable option compared to a big block. That 392 engine moves the 4200lb Charger/Challenger with authority. It really is a hell of an engine. The trick will be putting the traction down of course.
Thanks for the kind words. I know it’ll add infinitely more work to do the swap, but that’s the way I’m leaning for now. There’s just something about it that I really like.