Holley lists that sec plate with an .081 fuel orifice. That’s not jet size. A Holley 80 jet has a .089 orifice. In most 4150 style carbs, to keep fuel flow consistent front and back with a power valve in the front, you want “about” a 9-10 jet spread. That 3310 has a 71 main jet stock, so it’s been leaned a little on the primary. An 80 in the back would be a good starting point.