Need some advice about pistons, compression and all that good stuff. Here is what I have. A 289 bored .030 over with silvolite 1157 dished pistons (http://kb-silvolite.com/spistons.php?action=details&S_id=106, stock heads in a C code 65 with a 2V carb. I guess I'm wondering what my compression would be with these pistons. I've searched all around and found the stock compression should be around 9.3:1 with stock pistons, but I wasn't sure if these pistons were the original design. Any help would be appreciated.