Pete52~ If I can't get satisfactory results from the H/W, I may switch to the YF. My concern would be if the YF matches my current Rochester B in CFM. I have plenty of power with the original setup, it just runs too rich and leaks and stinks... My 1957 235 probably needs a little more that your 52 216. Did they make a YF for later engines or were they all the same?
