Shelby can supply any hydraulic or solid lifter flat tappet or roller cam and lifters to meet your engine needs. Stay with flat tappet cam, if your FE engine is as street driven restoration, or race-sanctioning rules require it. Or opt for a roller cam which permits more aggressive opening and closing ramps that can deliver more power. No block machining is required for roller lifter installation. Cams fit Shelby FE or factory cast iron FE blocks. Cam bearings are also available.