Leigh is correct. I just checked the list and it did note that the 3310-1 is a 780cfm unit with 72/76 jets and a 025 nozzle. It showed under "PV" to see notes #12 & 13. #12 shows a 8.5 secondary pv and #13 note shows a 10.5 primary pv. I found this info on page #1 of the Holley part number listings (which I can't get attached to this response).

Edit:
I made a two page PDF that shows the info including notes #12 & #13.