Here you go. I measured these specs on the original cam that was in my '72 1238861 block: Duration @ .006": Intake: 262 * Exhaust 282* Duration @ .050" : Intake 200* Exhaust 226* Lobe Separation: 118* Net Lobe Lift: Intake: .261" Exhaust: .285" Lift w/1.6 Rockers: Intake: .418" Exhaust: .456" Hope this helps. Larry