340 blocks and dates

Syleng1 said

The other option are they are Marine blocks.
Typically they were all rusted from the inside out. Raw water cooled.
I’ve run into a few along the shoreline back in the 80’s looking for the 340 engines. Bought them and found out they were useless.

Click to expand...

I highly doubt these are marine blocks. The guy raced them for years. They have flash rust on them from where the tarp blew off during a storm just before I picked them up. Machine work was done by Hensley Racing in Knoxville. They didn’t work on crap.