[Goober]

You can't register them as a 65-66 anymore. You will have to register it as the year it was built. They have pretty well closed the loop on Assembled/replicas with 60's titles.
What does the the current title say? If it's in Texas just pay the taxes and transfer it.
As far a inspection they go off of your insurance card. Get your speciality insurance company to say 1965/66 whatever on your insurance card. Then it requires a safety inspection only. Around $13.00. Just do a search on Texas Titles here and there is a wealth of reading.
Hope this helps

Mark