My old 65 plymouth used to run 6.50 in the 1/8 with out of the box 84cc Eddy heads. It had a stock stroke 440. The car weighed 3420 with me in it. I also had a 73 dart swinger that had a stock stroke 440 with pretty much out of the box indy EZ heads. The dart weighed 3520 with me in it and ran 10.60 in the 1/4. But letting my friend race it that was a 100 pounds lighter than me race the dart