Piston pin bad ?

Yes you are right, aluminum and steel expand and contract at different rates. I will be also listening to how Hughes handles this. Harland Sharp, Jesel and T&D cost more but as my dad use to tell me, "SON, NEVER BE AFRAID TO BUY THE BEST, YOU WON'T BE DISAPPOINTED!" I have ran Harland Sharp in all my race/street engines without a single failure