I scored a frame, What year is it?

[mild68]

I bought a 68 Step side at the end of last year, Haven't started working on it yet. I'm getting ready to start it as a winter project.
This past weekend I found a rolling chassis online. He was asking $700. I negotiated $500 before I made the hour long drive to check it out. It was supposed to be lowered w rear springs and front spindles. Not.
It does however have 5 lug wheels, disc brakes and a power steering box.
For me living and having cars and trucks from Illinois this thing is clean.
Anyway, $250 later I brought it home.

Can anyone tell from the stamping on the frame what year it is?