Picked up a quadrajet today. Number appears to be 170562. Anybody know what this came off of? CFM?

Picked up a quadrajet today. Number appears to be 170562. Anybody know what this came off of? CFM?

Appears to be missing a number I think

Missing 2 numbers.

I thought there might be 2 extra numbers but they were either lightly stamped or still a little dirty and I was in a hurry to get to work. I' ll clean it up and check again after work and give the rest of the number. Thanks.

OK, here is the complete number... 17056262.

OK, found out that it is off a 76 455 auto FB thanks to Mr. Wallaces website. Now does anyone know if it is 750 cfm or 800 cfm?

Very nice 800cfm unit.
Flow is restricted some from secondary airvalve opening, grind the stop tab for 1.36" from opened valves rear edge to back of choke air horn and you will have full flow.
You might try .0400"-.0300" secondary rods and 5/8 turn preload on airvalve spring.
Set the APT 3.5-4 turns up from seated to start with.
If required one change at the time and only if there is a real problem with idle:
1. Open the idle discharge ports some.
2. Open the idle tube some.
3. Add some idle bypass air
Measurement on the idle circuit modification depends on engine size and cam used.

Thanks for the info Kenth. I was wandering about the secondarys not quite opening all the way up top.