Oh, no, they aren't used, they are brand new. I bought them way back when but never used them (saving money by not paying for them to be pressed on the rods, silly me). They are still in their box, the only drawback being is that they are standard bore, not oversize. I'll have to find a very decent block to use them. So just as I thought, they'll work. The thing that was throwing me was just browsing through Jegs and seeing different piston groove dimensions. Thanks for backing me up, now I won't worry about using them! Great!!!