I have always used holly carbs ( don't know why) and have always had off idle stumbles, hesitations, flat spots, etc. I used to fix them with a different cam. My 750 vacuum secondary on my 347 stroker-cobra clone now has an off idle stumble/flat spot. I have rejetted it- changed the power valve ( 55) from 65. i got a book of cams bought the kit and spent an afternoon trying them out. I went full circle to no avail and put the stock one back in (orange)( which seemed best power wise) .I believe , without checking my notes that I tried the blue,white,red,and black ones. My question is this- should I change the squirter? Or am I headed down the wrong path? I am pretty much done spending money on her ( after the 347 stroker project) So a new demon carb is out of the question.