How many CFM is this carb?

Could someone help me determine the CFM rating of this carb? I've unsuccessfully scoured the internet for the rating.
This carb came off of a 78 Turbo V6, PN 17058246. I know it's a high altitude carb, but I don't know what differences there are between it and a "normal" carb.

Thanks,

 

Can't really tell from your pic, but if you have the carb in-hand, compare the primary bores to these photos:



Devon

 

It looks more like the top picture. Cool, an 800 CFM carb.

 

There's some discussion here from several years ago about a 1979 turbo carb:

http://www.turbobuick.com/forums/before-black-non-sfi-tech/84245-turbo-q-jet.html#post577692

I would think that the turbo site would be a good one find information about the carb.

 

Thanks for the link. My search must have been too particular when I tried. On the turbo buick sites there isn't much carb talk going on. I've asked a few question and there wasn't much info to be had, but people where genuinely helpful. There's a lot more traffic here, out of necessity, so I though I'd try my luck. My thanks to the people who have offered and may still offer help.