I have a 72 q-jet that I rebuilt myself. I read Cliff Ruggles book 3 times and watched dozens of clips on y-tube. I thought this carb would kick ass but I have failed. When I put it on a Edelbrock intake it at first wouldn’t take in gas finally got it to fill fuel bowl and it started but ran full out no letting up. I now realize this was too much for me to accomplish. I have heard that Rob Ross knows his ****! I you can help me send a PM.