Here, a standard LS cam (right) is shown with the custom stick from Comp Cams. Note the redesigned rear end, where the distributor drive gear is grafted. At the front is a fuel pump lobe. The cam used in our test engine had a standard small-block diameter, not the larger, 55mm size of the production LS cam--but the Motown II/Motown II LS blocks can accommodate a 55mm cam. Lift and duration specs are 0.650/0.660-inch and 250/255 degrees, respectively.