How do I tell if it's an 800cfm Quad?

[Johnny Angel]

I have a 1970 GS Stage 1. It has the stock carb, and I am interested in upgrading to an 800 cfm Quadrajet. I have access to rebuilt carbs, but would like some info on what seven digit part numbers to look for. I know that the forth number tells what year it is, and the second number tells what brand it came off of. Other than that I am clueless. What year is best? One part number that I have access to is #7042244 KC 3141. Is this a good one? It is buick, and it is from 1972. Other than that I do not know anything else about it. My rebuilder would no doubt let me look for specific numbers if I would ask. Also, is there any way to tell if a carb came off of a small block 350? The GS Facts and Figures book says not to use a 350 carb on a big block 455. Please help.
Regards, Johnny Angel.

[7 skylark 1]

http://www.blake.com/oemcarbs/buick.htm just did a quick search on the internet. check out this site for carb numbers. carb number 7042244 looks like a 350 carb. http://www.buickperformance.com/qjet.html this site is an excellent source of buick information. this link also has carb numbers and show you how to tell the difference between a 750 and 800 carb

[gsgns4me]

Click HERE (http://www.v8buick.com/showthread.php?t=15981&highlight=800+cfm) for a good picture on how to ID a 800 cfm Q-Jet.

[Johnny Angel]

Thank you very much, Dave and Dwane, for the links and the info. I will try to figure it out from here.
Regards, John.

[Marco]

Johnny -

Please consider registering your '70 stage1 in the factory stage1 registry if you haven't done so already - thanks!

[Nicholas Sloop]

The 71 800 cfm carb number ends in 540, the 72-74 800s end in 240 (unless there are some Riviera carbs with different numbers, but I don't think so)

[Johnny Angel]

I will Marco, just as soon as I get my papers from Wayne Roberts. Thank you very much for the info Nicholas. You guys on this site are the best! Thanks for all the help. I am sure I will have many more questions.
Regards, John.