Originally Posted by Michael 9111
383 keeps blowing back intake gasket out. Ran compression test and all cylinders had from 120 to 145 of compression. I hear that's low but this motor always has had around that much. I didn't degree in the cam just lined up the dots. But it's still blowing intake gasket out. Any thoughts on any of this or opinions?? Any help is greatly appreciated.
You need to run a PCV valve in one cover and a breather of some sort in the other or you got a lot of blowby somewhere.