Ran the numbers on my camquest program. It came out with Comp cams Xtreme marine 270H rpm range 1600 to 5800rpm. Cam and lifter kit part# CL11-240-4. Duration .050 226 intake 236 exhaust Lift 544 intake 547 exhaust. Peak HP 552@6000 Peak torque 516@ 5000. Hope this helps. :idea: