I made my test on the track, from 10 80 to 10.76 4 runs with stock V8 intake and 4 runs with needswings , the times were,, with stock 10.92, 10.80, 1085, and one not so good 10.99, then with the needswings the times were 10.80 ,10.76, 10.79 and 10.77 . . I posted it when i did the test, a while back,,, don't forget my car has the V8,, so i am not saying this would be the same for the V6 but i think the needswings is a lot better than the stock. or any other
USAF 1964 to 68 jim