Metering Plates, six pack
I am messing with metering plates on a 440 six pack now. I found this site information but according to Harold Demes (google him for his YouTube videos, he's 'the' man) and much of this is slightly incorrect. Rear plate, 34R6153B #35 has a 0.037" idle hole and the jet holes are 0.093" passenger side, 0.086" driver side. Front plate 34R6153B #34 is 0.037" idle hole and both jetting holes are 0.089". Those are hole sizes, you would need to convert to jet sizes if you are going to use billet plates.
The #35 plates are available out there. The #34 plates are not.