i was wondering if i could have some help with a few questions.... im going to be embarking on a Holley 3310 rebuild with the stamped code of 80508-2 with the 4 digit code of 2472 it has a power valve of 6.5 the secondary pump nozzle #31 and primary jets of 72.. i also picked up a 3310 that was in parts with a code of 3095 List-1850-1. the second carb has a power valve #6 secondary jets # 35 and primary jets of 692 i don't know where the 692 comes from.

first question. this will be going on a ford 410 that has been built up a little. and i was wondering if anyone had any suggestions on jet sizes when i put it together.
second question. the second carb. the primary jets don't match up with the Holley numbers. does anyone have any ideas on where they came from?
any tips and tricks? Thank you for looking and any suggestions.

 

The list 1850 is a 600 cfm carb and a 3310 is usually a 750 cfm so it seems the second carb is a bunch of parts from different carbs more than likely. The 692 jets would be a 69 1/2 size jet. some jets for really fine tuning came in 1 2 3 and I think 4 then the next size, but 4 may have been the next size as I think they were divided into quarter sizes but it has been a while since I messed with any of them. The 1850 carb probably had a secondary plate as opposed to a metering block with actual changeable jets in it. It would be a 4160 style carb and if the other has 2 metering blocks would be a 4150 style carb the 80508-2 carb should be a vacuum secondary carb and would have no rear squirter. at least not a functioning one..