Cliff's Quadrajet Parts and Rebuild Kits

Don’t see that # in the book. 
17055040 is there, 76-sc, 350 truck auto

 I mistyped the carb number, it should be a 17080213. Thanks

 It's not the timing, does it with or without the vacuum advance connected, and I swapped distributors and it still does it.
 One note, this is with the truck in gear, brake applied. Still gotta do a road test with the new distributor.
 This distributor has the 5 pin module that will retard the timing by 10° when the 5th wire is grounded. Will have to figure out how I want to use this feature now.

 Something else, I posed the question online, twice, and got two opposing views from AI.
 I don't put any stock in anything that AI says, because you can ask a question exactly the same 5 different times and get 5 different answers. The best way is to do the testing yourself.

Hello all, need some help identifying what quadrajet this is. This carb came with a 1970 Olds W-30 4 speed I purchased, car was non running.  This car doesn’t have the original engine in it so I didn’t expect it to have the rare 7040256 on it but this carb looks like it’s been messed with seeing as though the numbers are ground down. It looks like 7055041 or possibly 17055041, hard to tell since someone took a grinder to it and it doesn’t clean up any better than this with carb cleaner and a brush. Inside it has 72 jets, 47B rods, R hanger and CE rods
The casting numbers for the top is 7040728, main body 7042305, base 7029025 with a bigger 73 next to it. Also it has 7/32 holes in the throttle plates and some kind of baffle on one of the secondary air flaps I’ve never seen on a qjet before

Nice work!

 Thanks, the donor for the aluminum I used was the base plate off of an electric Dual-jet. Why not, right? A hacksaw, a couple of files, and a piece of sandpaper and its done.
 My first attempt was too thin and it cracked when I installed the adjustment screw. My mistake was in not threading the hole all the way through.  I tried to leave just a half a thread uncut for resistance so that the screw would hold its position.
 This one is threaded all the way and I just used blue Locktite to keep it from moving.