Finaly got to check the squish tonight on that top end I just bought. Like I told you when I called and checked, it cc'd out at around 11.5. Well the squish is at 10 thou.....and yes, if you try and spin it, it does hit!! (duh!) Do you have or know of anywhere to get rather thick base gaskets or a spacer? The base gaskets I have are around 11-12 thou. Does look like these old cases were decked at some time in the past. To raise it up to around 20-21cc's, about what thickness would I need?