[jonzcustomshop]

I took a look at both my 61 2wheel drives, both had the assembly plant # and the last digits of the vin , but neither had a "1" stamped in front of the assembly plant letter.
my 63 4 wheel drive was also this way, the door vin matches the frame, but no "3", or "K" (for 4X4) to denote the year of the frame , or weather it is a 4X4 or not. The vin on the door frame does have the "K"

my 65 and 66 2 wheel drives both have the year digit stamped in front of the assembly plant letter to show what year the frame is.

so it seems that there is no real way to find out what year frame you do have from the vin stamp.

your truck definitely had a big restoration done on it , and judging by how it looks now it was probably 20-30 years ago.

another telltale sign is the fact that the interior is painted blue, and is not the factory silver.

I do remember seeing it parked in front of a house a couple blocks from that guys place before he got it in the early 2000's-2002-2004 I think, and it looked pretty much the same as it does now minus the hubcaps.