Hi I could really use someone’s help, I have a 350 motor I have started to rebuild, but I do not know what it is from. I have the code 3970010 on the back of the motor and in the front by the head I have my suffix code and another, but this is where it gets weird at the end of the suffix code it has been grinded down and replaced by TKA, you can see the TKA is deeper and stamped differently than the others. But i can still see and read the old one, but not perfectly, it looks like a C or half a 0 I don’t know and the next one I have no clue but I can see the top and it looks like the top of a 3 so I don’t know if its a 3, 8, 2, p or a R, I have no idea. The last one I can read perfectly and it is a T, so my code goes like this, K06 10 C_T, I think, if not the grinded one is K06 10 TKA. And below it I have another one that is, C81165908. My head numbers are 462624. so I was wondering what I have for a block or if anyone could help me?