Fords of the '30s had a vehicle specific "vin" stamped on the frame in two places, both on the driver side frame rail top. One is back where the frame begins it's kick over the rear axle, not visible with the body on (and usually erroded away over the years). The one most knowledgeable inspectors look for is on the front portion of the rail forward of the firewall down leg, sometimes almost as far forward as where the stock steering box mounts.
Often the same number was stamped on the top of the trans bell housing, but not necessarily so.
BTW, for info on all 50 state reg policies here's a site that might be worth saving:
http://www.crankshaftcoalition.com/w...itle_a_hot_rod
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