whats your 60 ft? i had a whipple on my truck and i had to take 3 degrees out of the timing the computer already pulled out to get the motor from detonating. with all that tunnnig i had to do to get it to run right i beat a stock 03 buy 1 car. whipples power is mostly out of the hole. you should check out parish8 on ls1tech.com he had a good setup on a whipple. My buddie was runnig 16lbs of boost on a 5.3 with a whipple and the best he could run was a 12.8 he bumped it up to 18 or 20lbs i can remeber and it lifted the head. he could have ran alot better but there was so much tourqe he couldnt get the truck to hook it was just all over the place.