340 block 1969
I just got 1969 340 block that I won't to build for my 1971 Demon.
Was cleaning it today and there is copper or brass ring around each cylinder.
Does this mean I can run the heads without a gasket never seen this before any help would be helpful. Try to post pics.
![IMG_0198.JPG IMG_0198.JPG](https://www.forabodiesonly.com/mopar/attachments/img_0198-jpg.1715192635/)