It is a non-issue because you can't get a new Weiand that actually fits right out of the box! The last one I got half the bolt holes were 1/4" off and the casting was so bad that it cut the **** out of my finger.
Post #21 has it right. I tried using a brand new Weiand Action Plus and could not get it to fit correctly (bolt holes didn't line up). I tried it on two different engines. The machine work on the port mating surface is horrible. I wont even give it to someone else - just taking up space on the shelf. I used an RPM Air-Gap and it fits like a glove...
