Performance camshaft. Great low end torque. Decent vacuum at idle.Fits ALL IH International Harvester 266, 304, 345, and 392 V-8 engines.RPM RANGE: 1800-5000Valve lift is calculated with zero lash and rocker ratio of 1.6INTAKE TIMING DURATION: 256 deg.OPEN: 18 BEFORE TDCCLOSE: 58 AFTER BDCCAM LIFT: .281"VALVE LIFT: .450"EXHAUST TIMING DURATION: 262 deg.OPEN: 61 BEFORE BDCCLOSE: 21 AFTER TDCCAM LIFT: .290"VALVE LIFT: .465"LOBE CENTER: 110 deg.OVERLAP: 39 deg.CAM ADVANCE: 0 deg.THE ABOVE TIMING IS CHECKED AT .020 (OPEN) LIFTER RISE .020 (CLOSE)The following timing is taken at .050" lifter rise and gives a more accurate determination of camshaft position.INTAKE DURATION: 202 deg.OPEN: -9 BEFORE TDCCLOSE: 31 AFTER BDCEXHAUST DURATION: 208 deg.OPEN: 34 BEFORE BDCCLOSE: -6 AFTER TDCRECOMMENDED ISKY CAM KIT PARTS AND SETUP INFORMATIONLIFTERS: 1902-HYLIFTER TYPE: HYDRAULIC