[captaincommando]

Thought I would see if anyone can help me out here. I have tried but cannot find any info. on these pistons I have. Need the specs. so I can figure out my compression ratio and quench.
Pistons are showing P/N's H623P. Sterling is the brand. They have a flat dome on top, and are for a SBC 400 Std. Bore with 5.7 rods.
Can anyone help me out here...

 

[captaincommando]

That listing says that the 12.0:1 is with 64cc chamber heads. I will be running 76cc chamber heads. How would I figure out the compression on the 76cc chamber heads with these same pistons?