Help I lost my VIN

[68K20 x Drill]

So i got a 68 GMC 3/4 longfleet from the woods.
It was left behind by a guy who passed on to truck heaven a few years back.
His son said it had sat more than 10 years, and he had no paperwork, and no interest in old trucks. Maybe thats why dad left him?

Anyway, I got the truck home, washed out all the mess, and find the VIN plate is removed.

Interweb wisdom places another VIN on the frame either above the power steering box, or on the left framerail above the rear tire. I don't see a trace of either one, or any sign of forced removal.

If anyone has a good idea of somewhere else to look, I'm all ears. This truck could go back on the road so easily...

A pic for the truck porn addicts:



v8 conversion, np435, dana60, ac, not running