It's different, Mark. It belonged to one of Kevin's customers. I mapped it, he mapped it and it had 1.562 venturis and 1.75 throttle plates. I just got back from there checking out his files.
It's listed in the catalog in the front but, not in the back technical section. Tried calling the Holley tech line and there was a 40 minute wait, go figure.
I got called out, nicely I might add on it on DRR.
http://drr.infopop.cc/eve/forums/a/tpc/f/80760912/m/8467004716 Honestly, I'm not making this up. I guess I'm going to have to take photos from now on.