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Update for the engine. I took the engine block to the machine work. They will bore the cylinder but I need an 83.25mm oversize piston. Is there anyone tryout that before?
I would not bore the block until I had the proper pistons in my hands.

As for the size of the piston I don't know how much over the stock size that is. As I touched upon in an early post for a street build with reliability in mind the less the overbore the better. 0.015" or 0.030" is about it.
 
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