I tried to pursue the '65 registration option, unsuccessfully. The clerk had the rules change that you mention on the web page on her computer which she let me read for herself. I pursued it a little more - up through her supervisor's superivsor. I was told that yes, they used to permit titling as a '65, but the rules were changed because people were reselling them as "originals" - right .
Anyway, I was more interested in getting on the road, and the 2003 registration of a replica seemed to be more amenable to my insurance company so I didn't push the beaurocracy any further.