Hi guys! I had a Holley carburetor on my 350 Chevy SB. But I want to build a Rochester Quadrajet on it. I’ve already had one mounted, but it pissed from all holes. I guess that’s because I couldn’t clamp back, because there’s no connection. I measured the petrol pressure of the electric gasoline pump today, but the cure only shows about 0.1 bar, but that can’t be, can it? I will try tomorrow to see if it works, if I put a T-piece between it, so that I go right behind the carburetor back to the back. I only hope that the pressure is enough to fill the float chamber. I am open for better ideas! MfG Achja the carburetor has the number 70282820 630 According to the decoder, he should be year 1968.