sounds like you need some one who knows to set up a dana ive got 9 years of 8 sec. abuse on my dana. car weighs 3110. has a 1.27 60 on motor and 1.20 on bottle runs 8.80 on motor 7.70 on gas.rear end has been together for 17 years in the car.not even a bearing change.find a new builder,by the the picture is on the motor no juice!!!!!