I have not been able to verify, if the QF metering blocks still have the idle feed tube in the main metering well, like the oem 8896 does. This is a major cause of high speed lean out, when jetting down the intermediate circuit, as the restriction effects how big a main jet is effective. I would start over with a 2 circuit, or google the topic, and make up your own mind. BLP (Bo Laws) makes a billet block that supposedly picks up idle circuit fuel differently, but I haven't called them to verify.