Call or email Comp Cams and provide all your information, vehicle, weight, rear gears, transmission, engine displacement, engine year (roller or flat tappet), carb, intake,heads and above all the intended use. They can make a good suggestion then. They suggested one of their 4x4 Extreme (2wd truck) for mine and what little bit I've been able to drive, it has lots of grunt and reasonable idle.
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http://home.comcast.net/~r.landrum/w...tos.html-.html
'68 C-10 LWB, '98 Z-71 350 w/accessories (Serpentine), Edelbrock Performer, Edelbrock 1405 (600cfm) carb, GM HEI, CompCam Extreme 4x4 roller cam, Thorley Headers, Carter Electric Fuel Pump, Vintage Air, 700r4, 3.73, disc brakes and power steering upgrades.
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