Holiday Rambler is a Ford?

Va says roadmaster

Mine shows as a 06 Pace Arrow, on registration...

As long as the VIN is correct and everything is proper/legal, I don't care if my Southwind is titled as Boeing 747.
But, that's just me. :)

My Illinois registration shows I camp in a "roadmaster", Monaco's inhouse chassis manufacturer.

Virginia DMV titled my coach as a Ford. The bill of sale listed the chassis VIN which was a Ford number.

For my Holiday Rambler Oregon shows make as "HOLR".

Varies by the state
Some title everything by chassis vendor
Other states title by the MFG of the body on the vehicle, who actually built the finished vehicle, the rolling chassis just being One component of the vehicle

Although I have never seen a Chevy that's titled as "Fisher"
As in body by Fisher, used to be stamped in the four frame plate of every Chevy