Quote:
Originally Posted by dannobee
All you have are the casting numbers. Any other info is normally stamped on the end of the cams, but even then, it's no guarantee of anything because they could have been reground.
If you really want to know what you have, get out a dial indicator, a couple of rocker arms, and a degree wheel and measure them. The short cut would be to use a cam carrier and a rocker arm and measure valve lift, then compare to a chart of the race cams. But even then, you still wouldn't know the duration without using a degree wheel.
Or, if you happen to know an automotive machinist with a "cam doctor," he can put them in some V-blocks and tell you what you have.
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+1
The cast number are just a number for the blanks before grinding.
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