i used a new 205 block with new 4x4 cozi pistons, 0.5 o/s. new crank and rods, stripped her out yesterday to check and measure everything. the only thing i could find realy is the wrist pins seem to be very loose when inserted into piston, i think i may have used the pins from another set of pistons. all the shell are spot on, still has the hone marks on the bores and no evidence of the piston slapping the bores. thinking now it could be these peski wrist pins.