I waited for several months for a 143 from Crane but they kept telling my builder they had no cores.. We had to do something so I finally gave in and let the builder order the cam from Comp. I have looked at the specs on both cams and there is a difference. I am sure Rob is correct in saying the Crane is dead on GM specs. I have talked with a couple of people that told me that Crane was licensed or had authority to build cams to exact factory specs while other companies couldn't. I don't know how true this is but I would think that Crane may have been the company building the GM pieces that were available at one time. I am sure a company can grind anything you want but as far as an advertised production cam, it may have been true that Crane had rights no one else had... Anyone know ?
Tommy
