l67 rebuild questions

[ImpalaGTP]

so, I decided to freshen up the bottem end of the l67 while I had the motor out, and ran into a problem. cylinder 5 had some pitting, so I started honing it and I think I honed a little too much. I opened the bore up to 3.802 and its still pitted. does anyone know the piston to wall clearance on these motors? I was really hoping I wouldnt have to go oversized on this motor. thanks in advance I can't seem to find it anywhere.

btw its an o2 gtp with 180000 miles