Found...
'70 F 383 HP
VIN OB349139 the 1st "3" in the stamp may be an "8"...hard to tell
I took this motor out of a '70 road runner (not original) that supposedly came from Shaw air force base 20+ years ago.

PM me or email me if you have the car this engine belongs to.

CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax