I've also heard that Haisley's are the best too. Having said that I run a set of Columbus 5K's, the trick is you have to flat grind one end till they are 1.45" tall, I ground mine a little then cool them, grind a little and cool till I got them to the right height using a bench grinder. Then I installed them at .045-.055 stud protrusion and they start, idle and drive just about perfect. The only other thing I did was put a small piece of spray straw in the vacuum line going to the cruise control to take out the little bit of touchiness while cruising.
I fought this for a long time before I was given the right information.
Jim