Engine ID

[76StepSd]

Got these engine ID numbers off one of my dads engines....i tried to look them up but cant seem to find these  codes that are for any particular application.

V0107UKR  i understand the first 5 digits but could not find what the last 3 suffix code applied to and here is the partial vin number stamped beneath that one

CG71357 and looked like there was a "9" after those. Can anyone help?

Its definitely a Chevy 350 but do not know where the engine came from.

[zieg85]

Could it be a UKB at the end?  If so UKB    1981   350   con cab, a/t, A.I.R.   P LF5   150    2   C-30 & 3500,159.5WB

[76StepSd]

will look at it again to be sure.