440 for my RamCharger

413 said
How would the compression only be 9:1 with 6 pack pistons? .080 head gaskets? Seems like it should be higher. Would you like to share your numbers for calculating this?

They are .050 head gaskets. These are 452 open chamber heads, I didn’t cc them, but based on what other people have cc’d their heads, I’m guessing it’s close. Here’s how I got that