My advice is unless you plan on adding a lot of extra cooling capacity and/or risking the
engine block cracking, I would not bore the block out more than .030" (to 93.762mm) - at most .040" (to 94.016mm). If you haven't already done it, there is a mod to do to the heads to eliminate the 'hot spot' in the heads where the two exhaust ports 'meet'. It involves using the head gasket as a guide and marking the bottom of the heads for coolant passages in that location - you will want to use a smaller bit than the hole in the gaskets. I don't recall if there is a requirement to also drill the
engine block, but it should be fairly obvious. I hope this answers your question
