....Hello Everyone! I got my Holley jets, gasgets, jet removing tool & Holley Carb book yesterday. I had planned on putting in 70/82 jets in my carb because according to the plugs it's running rich. It now has 71/83 jets in it & when it was on the dyno it didn't put out anymore HP & TQ with the 71/83 jets than it did with the 70/82 jets. BUT the Holley book said that there is a 3% +/- tollerence on jet sizes & that the next size smaller might not even be any smaller!!! {If the 70's are on on the + size of the tollerence & the 71's are on the - size}.....GREAT!!! Any way I can measure the jets I have in their now to compare them to the new ones???? THANKS & have a fantastic 4th!!! Bill