I'm guessing you mean "Cal-Trac" bars? I have them on my S-10 and if I preload my converter too much I'll get what you describe. It's all about the launch technique. I was getting a 1.70 60ft time with no preload and a full throttle launch. Never got a chance to perfect it though, I'm sure there are gains to be had.
What hole is the front of the bar in? John recommended me to start out in the upper hole. IIRC, the lower hole results in a harder launch so you may try that and see...