You would have to clay check the piston-to-deck height for your particular application. On a stock motor it's like 0.030" between the piston top and the deck.

The issue here is essentially the diameter of the combustion chamber and whether or not the piston is going to smack into it. Since you'll be boring out the cylinders to 84 mm it is possible that even with the same piston-to-deck height, the dome of the piston will have a wide enough diameter to run into clearance problems with the stock combustion chamber. When this is a potential issue you have to reshape the combustion chamber to make room for the piston, this is called deshrouding.