Rochester 2 Barrel Carbs

Does anyone know a website, or possibly a good book, which gives good information about identifying Rochester 2 barrel carbs? I am particularly interested in finding the ones which will work with the 3x2 intakes. I have noticed that a lot 3x2 intakes call for a small flange and side fuel feed, but does that mean that all GM Rochester 2 barrels that GM used in the 70s and are in junkyards for a dime-a-dozen will work if they have those two features? I know a good bit about Strombergs, but my knowlede about Rochesters is minimum other than that there are small flange, large flange(2GC), and the ones made for factory tri-power setups(I think that's right). I really just need some info for when I am looking around at swap meets. Any advice would be appreciated.

 

The '57 -'58 J-2 Olds setups used a single 2GC (2bbl with choke) in the middle and a 2G (2 bbl without choke or idle circuit) at either end. They had the fuel inlet in the front of the fuel bowl and later it was changed to the side for obvious reasons. The 2Gs have a cast base with no idle adjustment screws. I think the 2GC carbs were the same as the ones used on cars with a single carb.

 

http://www.tocmp.com/manuals/Carbs/Rochester/2-Jet/Manual/index.html

Try this Lots of info to digest.

 

There's more differences.
The outboard carbs have a different ****erfly angle so they seal better when
shut

On mine the shaft arrangement is also different to accomodate special
linkage. Mine has a through shaft on the center carb with an arm on both
sides, the outboard carbs only have shafts coming through on the p*** side.

I have a Cadillac 2X3 on a Stude 289

 

Update and FYI:

I have done some research and found out that there are two types of Rochester 2 Barrel flanges: One with a 3 1/4 x 1 7/8 bolt pattern and one with a [FONT=Arial, Verdana]3 3/4 x 2 bolt pattern (Does that sound right to everybody?). Most of the aftermarket 3x2 intakes I have seen call for small flange carbs with side fuel inlet (side fuel inlet being necessary for clearance reasons). A thanks to Slick50, whose link to The Old Car Manual Project was very helpful.
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That link is one of the best things I've been hipped to in a long time. The HAMB,...I love this place.

Thanks!