K member identification help

[72golddustermike]

Only see these numbers on front and as few on bottom we thought was for a 70 b body when I bought it?

 

[PRND21]

Schumacher Creative Services, engine-swaps.com website has pictures to identify the different K-members.

 

[kiwigtx]

Only see these numbers on front and as few on bottom we thought was for a 70 b body when I bought it?View attachment 575554 View attachment 575555

Is there a 'coin' on the front with a 2-digit number?

 

[72golddustermike]

No coin

 

[Bee1971]

Is that a 15921 ? On the front

159th day of 1972 - 1 shift