WTB: rebuildable quadrajet for 1970 GMC C10 402 TH400

[picklito]

As title says, I'd like to start with as close to the original carb as possible.  1970 GMC 402 Turbo-400 federal emissions.  I think this would be 70402xx, but I can't find a way to get the last 2 digits for the 402/auto/federal.  What would have been original, and what do you have?
Thanks!

[Ethan1]

As title says, I'd like to start with as close to the original carb as possible.  1970 GMC 402 Turbo-400 federal emissions.  I think this would be 70402xx, but I can't find a way to get the last 2 digits for the 402/auto/federal.  What would have been original, and what do you have?
Thanks!

 I believe the correct carb you are looking for is 7040206. If you have a Service Manual for your truck, it should be in there.