Help me with a VIN please

['68OrangeSunshine]

Originally Posted by 71swb4x4

I agree with everything in this post except the sequence number started at 50001 in 1970.

Oh, OK. Never noticed that. Was the 50001 sequencing in one plant only? GMC only? 1970 only?
Although they were rare, stepsides did come in other than 6' [or is it 6-1/2'?]. There were also 8' and 9' lengths.
Usually the shortbed length was for 1/2 tons, the long beds for 3/4 tons and 1-tons got a longhorn bed. That was GM's manufacturing intent, according to the Chevy restoration packet, but dealerships and discerning owners could preorder any combination within reason.
And as you noted, 46 years is a long time for PO modifications occuring in the intervening years.