65 chevy vin

[mikebryant39]

I have a 65 half ton 2 wheel drive. According to the books I have the vin plate for 65 trucks should be located on the upper left hinge pillar. These same books say the vin plate for a 66 is located on the left hand roof rail, which is where the vin plate on my truck is located. However, the vin number itself identifies the truck as a 65, i.e. vin # C1445J100947. Also, the engine code shows that the truck has a 250 cu. in. six. The engine code is F0723TF which is a 66 or newer engine. The truck is a 4spd w/granny 1st, so the engine code matches the trans. Did any of the late production 65 models get 250 sixes instead of 230 sixes? I figure most likely the engine was replaced, but I'm not sure. Is there a way to date the engine? Secondly, I can't match the color code in the books I have. My truck has the paint code stamped as 540AD. Any ideas as to what that number means? The truck was originaly a turquoise which is coded as 510. Any help would be greatly appreciated. Thanks, Mike