As expected, Darrell (Bubba) Wallace Jr will be the driver for the #43 RPM car next year.
Interesting that Petty has not yet announced whether or not they will stick with Ford. It wouldn't surprise me to see RPM move to another manufacturer since their partnership with Roush has not been very impressive.
There also seems to be an expectation that RPM will again have a partnership with another team and it very well could continue to be Roush, especially considering that Bubba is a former Roush driver.
I would be a little surprised if Petty moved to Toyota since they seem to be focused on JGR who is already partnered with Furniture Row. However, now that Eric Jones is moving back to JGR and Furniture row has said they will not be running the 77 car next year I guess that might leave the door open for JGR to also partner with the single car RPM team.
So that leaves GM as the only other option. I suppose Hendrick could support another team with Chevy engines after they lost the four car SHR team to Ford power for 2017. I don't know if Ganassi gets more than just engines from Hendrick but even if they do there should still plenty of capacity to supply engines and chassis to a single car team like RPM.