Reply to "351-C Heads"

Adding a roller cam causes a few potential problems to consider. First, you cannot run a hydraulic roller unless you use a special-cut smaller base-circle cam, because the roller wheels protrude into the main oil galley on a std cam, causing a catastrophic drop in pressure. There is one roller lifter made with smaller rollers so there is no clearance notch, but I can't recall the mfgr. And roller cams are steel which means you need to either have the steel cam specially constructed to use a stock cam's cast iron distributor drive gear, or run a bronze gear on your distributor and change it yearly due to rapid wear. Finally, there are still some 351C cams out there that have the integral drive gears cut to the wrong angle and will fail any distributor gear within a few miles. They are difficult to inspect out of the engine- be very sure you get a guarantee that covers engine damage since the wear will spread steel particles throughout your engine. Hydraulic roller cams also require stronger valve springs and shorter hardened pushrods with guide plates.