I'm planning on building an lsvtec using a b18 from a '91 teg and head from a first gen b16a. If I were to use the stock ls pistons I've read that the compression ratio would go up from 9.2:1 to 9.7:1.
Is this correct?

 

It will go up to 9.5some.
If you used a p72 head comp. would go up to 9.7