oh I made it myself mostly, it was from a Mr gasket kit off the shelf at the local parts store. I'll go out to the garage and take a quick picture and add explanation of what I did, the picture tells a lot. I have a Carter AFB that I believe is a 625 CFM and a 1406 Edelbrock on the front(600cfm) kind of the same carburetors. not only are the Edelbrock easy to tune, but they fit correctly without having any sideways linkage like a Holley s would. fuel/air mixture distribute evenly from either carb or from both. I can rev it just as quick and crisp from either carb or both. I bought a wide band o2 sensor to help ajust the carburetors and its running between 11.5 to 12 which is a little rich but the plugs look good.
