Why does it do this? Is it just becuase the bolt is close to the cylinder bore?If you're going turbo try to keep it around 8.5. The stock numbers are 8.6 for gte and 9.4 or 9.2 i believe for ge.
One thing that hardly any machine shop will know and I didn't either untill recently is that if you bore or hone the cylinders you have to have the timing belt tensioner bolt torqued to spec or it will throw off your #1 cylinder bore.
Good luck on what you choose.