Both of my 68 1brl cams I have laying around have no markings on the base of the cam.
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1969 Firebird OHC 6 Sprint
Clifford Intake, Clifford Shorty Headers, Crane H320 Custom Grind Cam, Edelbrock 550CFM, T5 5 Speed Transmission (.63 OD), 8.5 10 Bolt Posi 4.11 Gears.
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