Power Valve Selection: The Definitive Answer

Well I did drill out the PV channels one drill size to 1/16. I tried going down one more size in the primaries from 70 to 68. The cuda didnt like it. Yes it got the A/F into the 14's but it was hunting and surging. I came back and put the 70's back in and it was happy again. The A/F ratios were back in the 13's and part throttle response was good. I think I found my leanest setting.