Oil Pan gasket you should be able to get from the parts store. And there still no way in hell you have 270 wheel horsepower with no intercooler and just a 3.4 pulley. Take it to the dyno. I'm betting it's closer to 220-230. You can't say your car has x power because someone with a similar mods put that down. So far that's the funniest **** I have ever heard on this forum.