Y-Block Revisited
The first Y-blocks were fitted with cams (bottom) that had four small holes cross-drilled through the center journal to send oil to the journals—not a great design. In 1956, Ford replaced the holes with a groove in the center journal. If you’re going to use a stock cam, be sure to use a ’56-or-later version, or an aftermarket cam with a center groove (like the F-300 from Isky, shown above). This cam is fairly aggressive, with 0.448-inch lift and 250 degrees duration at 0.050 inch. Carlisle could have used the 0.505-inch-lift cam, but decided against it for street driveability.
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