SBC ID help

Please help with identification. The code on the front passenger pad of block is: 16J207407 V01220KT Back of block driver's side : 3970010
Back of block passenger side A216 Thanks in advance for your help!

 

according to www.chevmania.com
<TABLE cellSpacing=2 cellPadding=1 width=600><TBODY><TR bgColor=#eeeeee><TD>3970010</TD><TD>302/350</TD><TD>69-79</TD><TD>145-370</TD><TD>car & Truck 2 & 4-Bolt Most common</TD></TR></TBODY></TABLE>
the 145-370 is hp

 

The date code is January 21, 1976, I couldn't find anything on that KT suffix code.

 

Do a search, there is so much here on sbc, that's the rule, it's real easy.

 

Did you look here:
http://www.mortec.com/castnum.htm