Top end help

Send it to a reputable shop and have them redo the top end. It needs to be OEM. On the left side of the intake (flywheel side) will be stamped Y-1 or Y-2.
The builder/shop will use a bore gauge and measure the cylinder in 6 spots. This checks for out of roundness, oversize, ect.
From here they will bore to next usable size if possible and chamfer the ports and hone to match the required piston specs.

Do it right the first time.
 
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