I bought my 670 Street Avenger a couple of years ago. The manual that came with it states that is is for part #'s 0-80570, 0-80670, 0-80770, 0-80870. The "Installation, Tuning, and Adjustment Manual" states;
WARNING: If you are using this carbeurator with a GM overdrive transmission TH700R4 or a TH200R4, you must use a transmission kickdown bracket (Holley P/N 20-95 and stud (Holley P/N 20-2, 20-38, or 20-40).
Otherwise SEVERE transmission damage WILL result. This carbeurator is not designed to work with any other automatic overdrive transmission.
To be sure you should go onto the Holley website and email them a question about your application, or call Technical Service at 1-888-465-5395.
did you use a holley kickdown stud 20-40 in the tv
stud hole in the carb or install a throttle valve corrector plate SONNAX # AS2-02K (tv corrector plate) on the carb and hook your tv cable to it ?
how is yours hooked up to the carb ?