Need pro advice Project X Block build Long term project.

If you aren’t going to boost it, you can either deck the O ring grooves out and use an MLS gasket. Much less crap to deal with that O rings and copper gaskets.

The other option is to clean the grooves out as clear as you can and fill the grooves with JB Weld or similar and then file it flat. I’ve done that in a pinch and at 15:1 and I had no issues with MLS gaskets.

Some guys put a copper wire in the groove and machine it off. I’ve seen it work. Just not my favorite way to do it.