[edwhite7]

I agree with the intake gasket. When you pulled the heads did the gasket come off easily or was it stuck to the head and intake? If it came off easily it was the gaskets. I have had the same problem with Alum block and heads, it is very hard to get the gasket to seal and it usually shows up after about 50 miles but usually causes a slight change in the idle due to the vacuum leak. I have heard that Gessford Machine sells an intake gasket, not felpro, that is less prone to this and I will try them the next time my intake is off. I have been over torqueing the center three intake bolts and this stops the problem for me. I don't mess with the corner bolts because extra torque on them seems to crush the gasket. I don't have a number but I just add a little extra until the problem goes away. If you have Alum heads like I do be careful that you have a lot of thread in the head.