The Stovebolt Site Forums The Shop Area Engine Shop 235 Engine Identification

Can you let me know if I have this decoded correctly?

Block casting: #3796716 CON 4 C40 GM 18 Stamped number F0307J That this is a cid 235 cast on March 4 1960, The F= June 03 1960 7=? J=??

The cylinder head casting: #3836848 GM30 CON 9 D116. That this is a 235 head cast in April 11 1956.

Thanks for any and all help.