We ran 9.80s all day long with a stock 8 3/4 ! And I do mean stock ! My best 60ft was 1.29 with it, we were close to 3500lbs race ready ! I did that for a year, then put a spool back brace axles in it, then ran it for another year and switched to the strange 60 from doc diff ! Car went just as quick until I broke the block