I talked to Gary a while back and that's what he told me. So I found a set. lol That's about all I know. I'm sure he'd be glad to tell you all about it. Give him a call. He's a super nice guy. And I know it's not rocket science. I was throwin it out there for another alternative. The Buick pieces are ductile iron, much like the adjustable small block rockers. They are usually MUCH more accurate to begin with. You'd probably pick up some HP just by having them bushed (they have a different shaft size) and installing them, much less having them changed to 1.6.
