Well, when writing in the "make" and "model year" on the CA application for title form, I would be VERY circumspect about writing in 1965 Ford or 1965 Cobra or 1965 Kirkham or whatever. You sign under penalty of perjury, no matter what your "insert State here" legal title says.
http://www.dmv.ca.gov/forms/reg/reg343.pdf
You have a legal title from another state stating that you have a 1965 something, but it isn't a 1965 something. It replicates a 1965 something, but the CA form doesn't ask for what year it replicates.
Personally, I would be nervous and always looking over my shoulder.