Help! I am having my '72 Q-Jet rebuilt ('72 SS 402) and I know that the primary jets and possibly the secondary jets were replaced with oversized jets. Can anyone tell me what the proper size orifices are? I think this is a 650CFM carb. If there are slightly larger size jets that will perform nicely, pass this on also, but I would like to know what the stock sizes were so I can go back. Thanks in advance.