I just read this in another discussion..

Quote
Originally posted by John Millman:
..as far as I know (and Jolly and the rest of the '60-'66 experts ought to be along soon), your truck is a custom after-market mod. Chevrolet didn't offer a factory crewcab until the '73 model year (Dodge introduced the crewcab in it's '63 model year, by the way...).
When reviewing Vin Cruncher data thru '72 I haven't seen any refrence to a crew or extended cab.. i'd have thought if the DID make a factory one pre '72 it would have been mentioned in VIN data.

an idea is only stupid if you think about it rationally.