60ft is def slow compared to E.T. Get the 60's where it should be which I'm guessing should be like high 1.2's and I think the car will preform like it should. My guess is maybe convertor. One thing I don't think that was mention is the car getting full throttle? I know some racers that cars will dip into the 9's so they slow them up to run 10.00's since they aren't certified or have their NHRA lic. By doing this they slow down their E.T. but they have good MPH for their E.T. Also I know a guy that has a car that runs consistent 5.2's in the 1/8 with ladder bar...so needing a 4 link is total BS.