stock b-series pistons are floating pin and stock rods are press fit. Eagle rods are floating pin and designed to be used with a piston that uses retainer clips to hold the wrist pin in . If you run the eagle rods with ctr pistons the wrist pin will float out and into the cylinder wall and basically destroy the whole motor given enough time. OEM pistons can be machined to use the retaining clips but it would probably get pricey and I don't know of anyone who does it locally. I heard Bush and Leitner in Canada does it.