Cracked j heads

MOPAROFFICIAL said
Stop leak.
Yes. I have seen that. Once.
Block was cracked too. 1976 or 79 block iirr

You have a 72 block, j heads are 71-73. Are they original to the block?
Click to expand...
No they aren't original to the block.The more I think about this is the 4th block I've had them on.