I used Permatex Motoseal 1 on a Huztl 56mm. The squish was .023 but I did have about .012 Freeport. I can't pull it over without the decomp which also means I can't get a reading on the compression. This build is noticeably stronger than a 54mm build without base gasket.I went with 1184 only for .020" squish.