I have a 302 GMC with 3 Weber 32/36 DGVA progressive carbs on it. I believe they are similar to the Holley/Webers referrded to above. I have them on a home made manifold that consists of three tapered steel 90 degree bends feeding the ports. The three bends are connected by two rubber balance tubes. The carbs were designed to feed 1600 cc engines which is about 100 cubic inches or coincidently 1/3 of the GMC displacement. They work great. I got 17.5 mpg on a 200 mile trip in a 3300 lb 1940 Chevy going 60 -70 mph. Acceleration is very strong as well.
