Found this: Basic operating RPM range: 2,800-6,800 RPM Camshaft style: mechanical flat tappet Cross reference: GM #3849346 Duration (@ 050 inch lift): 254 int. / 254 exh. Duration (advertised): 346 int. / 346 exh. Lifters: Solid Lobe separation (degrees): 114 Valve lash: .024 int. / .026 exh. Valve lift (w/factory rocker ratio): .485 int. / .485 exh.
We always referred to the 327-365 HP cam as the 30-30 cam because that was the valve lash. This is from memory but I think I'm right.
Been there and had one of them & loved it. Would turn over 10 grand at times, but ate plugs like crazy.
Had one in a 62 Impala back in the 70's. Wicked cam. Back then I didnt mind adjusting the lifters once a week. I always heard it called a 3030 Duntov so I supposed Arkus Duntov designed it. Sounds good anyway.
Between 30-30 cams and Corvette valve covers, there were way more Corvette claimed to be motors in cars than GM ever built.
The PN:3863152 hydraulic cam was rated at 350hp, and it came on at 3K rpm...had just enough lope at idle to suggest something was up. I never had to set another lifter after that. Here's a good spec site for most of the factory cams. http://www.geocities.com/MotorCity/Downs/3000/cmspec.html
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