Mustang boss 302 vs mopar!

In stock form 340 vrs 302 , 350 ect . I have four brothers , me being the youngest at 50 now , we all had mopars , they used to race on a bridge here in Miramichi , it was 1/4 mile long , i remember there being only one boss here was grabber orange 69 with a four speed , and there was a 70 1/2 Z28 Camaro also that was suposed to be strong at the time .My second oldest brother had a 70 340 Duster , green coloum auto rubber floor mat , dog dish hub caps not fancy like the others, but he told me , he could take the 302 by 4 to 5 lenghts everytime , and the Z28 usually a car length . And these cars were practicaly new at the time.