The primary throttle blades are closed up so as to only show a very small portion of the transfer slot. As per previous tuning threads what you see is that the transfer slot looks like a square when viewed from below.
Then you could have some other issues. One I found a lot on older Holley stuff was the power valve will hit the boss in the main body. This holds the metering block off the main body and you get a leak, and the PV gets blamed. The same type of issue can happen if the main body or the metering block aren’t flat. I’ve seen both be pretty warped. If you can close the throttle blades all the way and the engine keeps running you are getting air somewhere. Also, have you verified where the secondary throttle blades are and how much they are open?
