Thanks for the response I think I will stick with the small block idea and do the 408 stroker from the 360 block. This will be my first Mopar build so I will on the forum a lot for advice and tips.
If you are OK with the small block I would definitely stick to that route on your first Mopar project. The big block conversion will cost a lot more than you realize and is not easy even for hard core Mopar veterans.