88-91 civic/crx d-series sohc engine cam specs

having read a number of confusing and conflicting info on cam specs for the old d-series motors saying that the si cam and zc cam are the same, i have done some homework, namely acquiring cams from all 3 of the main
motor types, and have measured the cam specs accordingly:
model        cam°    lift-mm dx    in    152    5.56     ex    166    4.66              ex/si    in    156    5.74     ex    166    4.94              zc    in    164    5.92     ex    168    4.96
1. these are direct measurements taken with the cam out of the motor - not trying to measure in the motor via a rocker arm or crank shaft.
2. the zc cam was removed by me personally from a genuine jdm sohc zc motor, so it is authentic.
conclusion: the zc and si cams are /not/ the same.
the reports i've read where other people have measured no differences seem to be because some individual on e-bay has been ripping people off selling si cams as a zc's - possible because there are no distinguishing marks between the two other than direct measurement of the cam profiles.

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