1968 340 Manual Cam

Those were pretty aggressive for the day. Heavy on the duration and easy on the lift. Easy on springs and valve train. 284/292° .445/.455 for the 4 speed cam with 60° overlap.
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A generation,before my time TMM..('85 high school senior).. I like that cam,reminds me of the Crane Hi Intensity hydraulic cams.. They just, flat work...