a holley carb given to me - identification

i was given a holley carb and know nothing about them

I run a 64 273. headers and comp high energy cam

here are the numbers that I found on the side of the holley
385
33102

then it says "List 3310-2 1725"
in another place it reads 34R 1784

and in another spot 1762

on each end it says patent pending and has a couple dozen very very small numbers i have not taken the time to get a magnifying glass to read.

Any help in knowing what this thing is and if I can actually use it would be great.

thanks so much for any and all help.
Merry Christmas!!!